21022212112011 has 32 divisors (see below), whose sum is σ = 35071269488640. Its totient is φ = 12329743168800.

The previous prime is 21022212112001. The next prime is 21022212112063. The reversal of 21022212112011 is 11021121222012.

21022212112011 is a `hidden beast` number, since 210 + 2 + 221 + 211 + 20 + 1 + 1 = 666.

It is not a de Polignac number, because 21022212112011 - 2⁶ = 21022212111947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21022212112001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1141633680 + ... + 1141652093.

It is an arithmetic number, because the mean of its divisors is an integer number (1095977171520).

Almost surely, 2^{21022212112011} is an apocalyptic number.

21022212112011 is a deficient number, since it is larger than the sum of its proper divisors (14049057376629).

21022212112011 is a wasteful number, since it uses less digits than its factorization.

21022212112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283285824 (or 2283285818 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21022212112011 its reverse (11021121222012), we get a palindrome (32043333334023).

The spelling of 21022212112011 in words is "twenty-one trillion, twenty-two billion, two hundred twelve million, one hundred twelve thousand, eleven".