21211233102 has 32 divisors (see below), whose sum is σ = 47799970560. Its totient is φ = 6970826520.

The previous prime is 21211233097. The next prime is 21211233163. The reversal of 21211233102 is 20133211212.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 2762368 + ... + 2770035.

It is an arithmetic number, because the mean of its divisors is an integer number (1493749080).

Almost surely, 2^21211233102 is an apocalyptic number.

21211233102 is an abundant number, since it is smaller than the sum of its proper divisors (26588737458).

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

21211233102 is a wasteful number, since it uses less digits than its factorization.

21211233102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5532485 (or 5532479 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21211233102 its reverse (20133211212), we get a palindrome (41344444314).

The spelling of 21211233102 in words is "twenty-one billion, two hundred eleven million, two hundred thirty-three thousand, one hundred two".