21111021230 has 32 divisors (see below), whose sum is σ = 40986316224. Its totient is φ = 7782759936.

The previous prime is 21111021227. The next prime is 21111021251. The reversal of 21111021230 is 3212011112.

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, 41387 + ... + 209606.

It is an arithmetic number, because the mean of its divisors is an integer number (1280822382).

Almost surely, 2^21111021230 is an apocalyptic number.

21111021230 is a deficient number, since it is larger than the sum of its proper divisors (19875294994).

21111021230 is a wasteful number, since it uses less digits than its factorization.

21111021230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251660.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21111021230 its reverse (3212011112), we get a palindrome (24323032342).

The spelling of 21111021230 in words is "twenty-one billion, one hundred eleven million, twenty-one thousand, two hundred thirty".