21013032102 has 32 divisors (see below), whose sum is σ = 44467221120. Its totient is φ = 6601305600.

The previous prime is 21013032091. The next prime is 21013032137. The reversal of 21013032102 is 20123031012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455524 + ... + 499527.

It is an arithmetic number, because the mean of its divisors is an integer number (1389600660).

Almost surely, 2^21013032102 is an apocalyptic number.

21013032102 is an abundant number, since it is smaller than the sum of its proper divisors (23454189018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21013032102 is a wasteful number, since it uses less digits than its factorization.

21013032102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955268.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21013032102 its reverse (20123031012), we get a palindrome (41136063114).

The spelling of 21013032102 in words is "twenty-one billion, thirteen million, thirty-two thousand, one hundred two".