21112212010 has 32 divisors (see below), whose sum is σ = 38590732800. Its totient is φ = 8314650240.

The previous prime is 21112211993. The next prime is 21112212067. The reversal of 21112212010 is 1021221112.

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, 246390 + ... + 320830.

It is an arithmetic number, because the mean of its divisors is an integer number (1205960400).

Almost surely, 2^21112212010 is an apocalyptic number.

21112212010 is a deficient number, since it is larger than the sum of its proper divisors (17478520790).

21112212010 is a wasteful number, since it uses less digits than its factorization.

21112212010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74886.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21112212010 its reverse (1021221112), we get a palindrome (22133433122).

The spelling of 21112212010 in words is "twenty-one billion, one hundred twelve million, two hundred twelve thousand, ten".