21210231102 has 16 divisors (see below), whose sum is σ = 42957431040. Its totient is φ = 6980582232.

The previous prime is 21210231089. The next prime is 21210231121. The reversal of 21210231102 is 20113201212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22373188 + ... + 22374135.

It is an arithmetic number, because the mean of its divisors is an integer number (2684839440).

Almost surely, 2^21210231102 is an apocalyptic number.

21210231102 is an abundant number, since it is smaller than the sum of its proper divisors (21747199938).

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

21210231102 is a wasteful number, since it uses less digits than its factorization.

21210231102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44747407.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21210231102 its reverse (20113201212), we get a palindrome (41323432314).

The spelling of 21210231102 in words is "twenty-one billion, two hundred ten million, two hundred thirty-one thousand, one hundred two".