21012111230 has 32 divisors (see below), whose sum is σ = 41270692320. Its totient is φ = 7638814720.

The previous prime is 21012111167. The next prime is 21012111251. The reversal of 21012111230 is 3211121012.

It is a super-2 number, since 2×21012111230² (a number of 21 digits) contains 22 as substring.

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, 449522 + ... + 494058.

It is an arithmetic number, because the mean of its divisors is an integer number (1289709135).

Almost surely, 2^21012111230 is an apocalyptic number.

21012111230 is a deficient number, since it is larger than the sum of its proper divisors (20258581090).

21012111230 is a wasteful number, since it uses less digits than its factorization.

21012111230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48844.

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

Adding to 21012111230 its reverse (3211121012), we get a palindrome (24223232242).

The spelling of 21012111230 in words is "twenty-one billion, twelve million, one hundred eleven thousand, two hundred thirty".