21032102012 has 12 divisors (see below), whose sum is σ = 37018932216. Its totient is φ = 10455264240.

The previous prime is 21032102011. The next prime is 21032102023. The reversal of 21032102012 is 21020123012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032102011) 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, 15195914 + ... + 15197297.

It is an arithmetic number, because the mean of its divisors is an integer number (3084911018).

Almost surely, 2^21032102012 is an apocalyptic number.

It is an amenable number.

21032102012 is a deficient number, since it is larger than the sum of its proper divisors (15986830204).

21032102012 is a wasteful number, since it uses less digits than its factorization.

21032102012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30393388 (or 30393386 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21032102012 its reverse (21020123012), we get a palindrome (42052225024).

The spelling of 21032102012 in words is "twenty-one billion, thirty-two million, one hundred two thousand, twelve".