21022211122212 has 48 divisors (see below), whose sum is σ = 50634713948672. Its totient is φ = 6781281949440.

The previous prime is 21022211122201. The next prime is 21022211122223. The reversal of 21022211122212 is 21222111222012.

It is an interprime number because it is at equal distance from previous prime (21022211122201) and next prime (21022211122223).

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, 39335088 + ... + 39865944.

Almost surely, 2^{21022211122212} is an apocalyptic number.

It is an amenable number.

21022211122212 is an abundant number, since it is smaller than the sum of its proper divisors (29612502826460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21022211122212 is a wasteful number, since it uses less digits than its factorization.

21022211122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637348 (or 637346 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21022211122212 its reverse (21222111222012), we get a palindrome (42244322344224).

The spelling of 21022211122212 in words is "twenty-one trillion, twenty-two billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twelve".