21111202232 has 32 divisors (see below), whose sum is σ = 40109894400. Its totient is φ = 10415399904.

The previous prime is 21111202219. The next prime is 21111202291. The reversal of 21111202232 is 23220211112.

It is a self number, because there is not a number n which added to its sum of digits gives 21111202232.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1079243 + ... + 1098629.

It is an arithmetic number, because the mean of its divisors is an integer number (1253434200).

Almost surely, 2^21111202232 is an apocalyptic number.

It is an amenable number.

21111202232 is a deficient number, since it is larger than the sum of its proper divisors (18998692168).

21111202232 is a wasteful number, since it uses less digits than its factorization.

21111202232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21195 (or 21191 counting only the distinct ones).

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

Adding to 21111202232 its reverse (23220211112), we get a palindrome (44331413344).

The spelling of 21111202232 in words is "twenty-one billion, one hundred eleven million, two hundred two thousand, two hundred thirty-two".