21112020222212 has 24 divisors (see below), whose sum is σ = 37526787164160. Its totient is φ = 10390327405920.

The previous prime is 21112020222179. The next prime is 21112020222259. The reversal of 21112020222212 is 21222202021112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30453239 + ... + 31138782.

It is an arithmetic number, because the mean of its divisors is an integer number (1563616131840).

Almost surely, 2^{21112020222212} is an apocalyptic number.

It is an amenable number.

21112020222212 is a deficient number, since it is larger than the sum of its proper divisors (16414766941948).

21112020222212 is a wasteful number, since it uses less digits than its factorization.

21112020222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61593371 (or 61593369 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21112020222212 its reverse (21222202021112), we get a palindrome (42334222243324).

The spelling of 21112020222212 in words is "twenty-one trillion, one hundred twelve billion, twenty million, two hundred twenty-two thousand, two hundred twelve".