21112212012010 has 64 divisors (see below), whose sum is σ = 43598033049600. Its totient is φ = 7210659704832.

The previous prime is 21112212011987. The next prime is 21112212012049. The reversal of 21112212012010 is 1021021221112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18525274 + ... + 19631866.

It is an arithmetic number, because the mean of its divisors is an integer number (681219266400).

Almost surely, 2^{21112212012010} is an apocalyptic number.

21112212012010 is an abundant number, since it is smaller than the sum of its proper divisors (22485821037590).

21112212012010 is a wasteful number, since it uses less digits than its factorization.

21112212012010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107655.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21112212012010 its reverse (1021021221112), we get a palindrome (22133233233122).

The spelling of 21112212012010 in words is "twenty-one trillion, one hundred twelve billion, two hundred twelve million, twelve thousand, ten".