1231213102 has 24 divisors (see below), whose sum is σ = 2150758656. Its totient is φ = 527069088.

The previous prime is 1231213099. The next prime is 1231213103. The reversal of 1231213102 is 2013121321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231213103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86803 + ... + 99985.

It is an arithmetic number, because the mean of its divisors is an integer number (89614944).

Almost surely, 2^1231213102 is an apocalyptic number.

1231213102 is a deficient number, since it is larger than the sum of its proper divisors (919545554).

1231213102 is a wasteful number, since it uses less digits than its factorization.

1231213102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14152 (or 14145 counting only the distinct ones).

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

The square root of 1231213102 is about 35088.6463403763. The cubic root of 1231213102 is about 1071.7933944814.

Adding to 1231213102 its reverse (2013121321), we get a palindrome (3244334423).

The spelling of 1231213102 in words is "one billion, two hundred thirty-one million, two hundred thirteen thousand, one hundred two".