1203212131 has 4 divisors (see below), whose sum is σ = 1312595064. Its totient is φ = 1093829200.

The previous prime is 1203212119. The next prime is 1203212137. The reversal of 1203212131 is 1312123021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1203212131 - 2¹⁷ = 1203081059 is a prime.

It is a super-2 number, since 2×1203212131² = 2895438864371122322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1203212137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54691450 + ... + 54691471.

It is an arithmetic number, because the mean of its divisors is an integer number (328148766).

Almost surely, 2^1203212131 is an apocalyptic number.

1203212131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1203212131 is a deficient number, since it is larger than the sum of its proper divisors (109382933).

1203212131 is a wasteful number, since it uses less digits than its factorization.

1203212131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109382932.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1203212131 is about 34687.3482843529. The cubic root of 1203212131 is about 1063.6058906880.

Adding to 1203212131 its reverse (1312123021), we get a palindrome (2515335152).

The spelling of 1203212131 in words is "one billion, two hundred three million, two hundred twelve thousand, one hundred thirty-one".