1231211122 has 8 divisors (see below), whose sum is σ = 1864076976. Its totient is φ = 609852132.

The previous prime is 1231211119. The next prime is 1231211123. The reversal of 1231211122 is 2211121321.

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

It is a junction number, because it is equal to n+sod(n) for n = 1231211096 and 1231211105.

It is not an unprimeable number, because it can be changed into a prime (1231211123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2876448 + ... + 2876875.

It is an arithmetic number, because the mean of its divisors is an integer number (233009622).

Almost surely, 2^1231211122 is an apocalyptic number.

1231211122 is a deficient number, since it is larger than the sum of its proper divisors (632865854).

1231211122 is a wasteful number, since it uses less digits than its factorization.

1231211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5753432.

The product of its digits is 48, while the sum is 16.

The square root of 1231211122 is about 35088.6181261104. The cubic root of 1231211122 is about 1071.7928199391.

Adding to 1231211122 its reverse (2211121321), we get a palindrome (3442332443).

The spelling of 1231211122 in words is "one billion, two hundred thirty-one million, two hundred eleven thousand, one hundred twenty-two".