221231012102 has 16 divisors (see below), whose sum is σ = 332943898560. Its totient is φ = 110249935488.

The previous prime is 221231012087. The next prime is 221231012113. The reversal of 221231012102 is 201210132122.

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, 1992899 + ... + 2100977.

It is an arithmetic number, because the mean of its divisors is an integer number (20808993660).

Almost surely, 2^221231012102 is an apocalyptic number.

221231012102 is a deficient number, since it is larger than the sum of its proper divisors (111712886458).

221231012102 is a wasteful number, since it uses less digits than its factorization.

221231012102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111455.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221231012102 its reverse (201210132122), we get a palindrome (422441144224).

The spelling of 221231012102 in words is "two hundred twenty-one billion, two hundred thirty-one million, twelve thousand, one hundred two".