21211131102 has 32 divisors (see below), whose sum is σ = 48486926592. Its totient is φ = 6059780544.

The previous prime is 21211131089. The next prime is 21211131103. The reversal of 21211131102 is 20113111212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211131103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 832618 + ... + 857714.

It is an arithmetic number, because the mean of its divisors is an integer number (1515216456).

Almost surely, 2^21211131102 is an apocalyptic number.

21211131102 is an abundant number, since it is smaller than the sum of its proper divisors (27275795490).

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

21211131102 is a wasteful number, since it uses less digits than its factorization.

21211131102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45232.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21211131102 its reverse (20113111212), we get a palindrome (41324242314).

The spelling of 21211131102 in words is "twenty-one billion, two hundred eleven million, one hundred thirty-one thousand, one hundred two".