21222212111210 has 32 divisors (see below), whose sum is σ = 41681591976384. Its totient is φ = 7715522752000.

The previous prime is 21222212111207. The next prime is 21222212111281. The reversal of 21222212111210 is 1211121222212.

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, 20047751 + ... + 21079770.

It is an arithmetic number, because the mean of its divisors is an integer number (1302549749262).

Almost surely, 2^{21222212111210} is an apocalyptic number.

21222212111210 is a deficient number, since it is larger than the sum of its proper divisors (20459379865174).

21222212111210 is a wasteful number, since it uses less digits than its factorization.

21222212111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41132230.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21222212111210 its reverse (1211121222212), we get a palindrome (22433333333422).

The spelling of 21222212111210 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twelve million, one hundred eleven thousand, two hundred ten".