21111202230 has 16 divisors (see below), whose sum is σ = 50666885424. Its totient is φ = 5629653920.

The previous prime is 21111202219. The next prime is 21111202291. The reversal of 21111202230 is 3220211112.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 351853341 + ... + 351853400.

It is an arithmetic number, because the mean of its divisors is an integer number (3166680339).

Almost surely, 2^21111202230 is an apocalyptic number.

21111202230 is an abundant number, since it is smaller than the sum of its proper divisors (29555683194).

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

21111202230 is a wasteful number, since it uses less digits than its factorization.

21111202230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703706751.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21111202230 its reverse (3220211112), we get a palindrome (24331413342).

The spelling of 21111202230 in words is "twenty-one billion, one hundred eleven million, two hundred two thousand, two hundred thirty".