20211222121112 has 64 divisors (see below), whose sum is σ = 41368468521600. Its totient is φ = 9180847229440.

The previous prime is 20211222121109. The next prime is 20211222121151. The reversal of 20211222121112 is 21112122211202.

It is a super-2 number, since 2×20211222121112² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 1314372368 + ... + 1314387744.

It is an arithmetic number, because the mean of its divisors is an integer number (646382320650).

Almost surely, 2^{20211222121112} is an apocalyptic number.

20211222121112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20211222121112 is an abundant number, since it is smaller than the sum of its proper divisors (21157246400488).

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

20211222121112 is a wasteful number, since it uses less digits than its factorization.

20211222121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24296 (or 24292 counting only the distinct ones).

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

Adding to 20211222121112 its reverse (21112122211202), we get a palindrome (41323344332314).

The spelling of 20211222121112 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred twelve".