211212221220022 has 16 divisors (see below), whose sum is σ = 345620787480144. Its totient is φ = 96005335900000.

The previous prime is 211212221220019. The next prime is 211212221220083. The reversal of 211212221220022 is 220022122212112.

It is a super-2 number, since 2×211212221220022² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 211212221219975 and 211212221220002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 900229 + ... + 20572672.

It is an arithmetic number, because the mean of its divisors is an integer number (21601299217509).

Almost surely, 2^{211212221220022} is an apocalyptic number.

211212221220022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211212221220022 is a deficient number, since it is larger than the sum of its proper divisors (134408566260122).

211212221220022 is a wasteful number, since it uses less digits than its factorization.

211212221220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21920015.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 211212221220022 its reverse (220022122212112), we get a palindrome (431234343432134).

The spelling of 211212221220022 in words is "two hundred eleven trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty thousand, twenty-two".