21221201102 has 32 divisors (see below), whose sum is σ = 32449243680. Its totient is φ = 10407196800.

The previous prime is 21221201087. The next prime is 21221201117. The reversal of 21221201102 is 20110212212.

It is an interprime number because it is at equal distance from previous prime (21221201087) and next prime (21221201117).

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, 13287368 + ... + 13288964.

It is an arithmetic number, because the mean of its divisors is an integer number (1014038865).

Almost surely, 2^21221201102 is an apocalyptic number.

21221201102 is a deficient number, since it is larger than the sum of its proper divisors (11228042578).

21221201102 is a wasteful number, since it uses less digits than its factorization.

21221201102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21221201102 its reverse (20110212212), we get a palindrome (41331413314).

The spelling of 21221201102 in words is "twenty-one billion, two hundred twenty-one million, two hundred one thousand, one hundred two".