1233131421 has 8 divisors (see below), whose sum is σ = 1649429440. Its totient is φ = 819460512.

The previous prime is 1233131413. The next prime is 1233131429. The reversal of 1233131421 is 1241313321.

It is an interprime number because it is at equal distance from previous prime (1233131413) and next prime (1233131429).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1233131421 - 2³ = 1233131413 is a prime.

It is a super-2 number, since 2×1233131421² = 3041226202914958482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233131429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 655681 + ... + 657558.

It is an arithmetic number, because the mean of its divisors is an integer number (206178680).

Almost surely, 2^1233131421 is an apocalyptic number.

It is an amenable number.

1233131421 is a deficient number, since it is larger than the sum of its proper divisors (416298019).

1233131421 is a wasteful number, since it uses less digits than its factorization.

1233131421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313555.

The product of its digits is 432, while the sum is 21.

The square root of 1233131421 is about 35115.9710245922. The cubic root of 1233131421 is about 1072.3497494921.

Adding to 1233131421 its reverse (1241313321), we get a palindrome (2474444742).

The spelling of 1233131421 in words is "one billion, two hundred thirty-three million, one hundred thirty-one thousand, four hundred twenty-one".