20221212222100 has 72 divisors (see below), whose sum is σ = 45226045222848. Its totient is φ = 7842792211200.

The previous prime is 20221212222097. The next prime is 20221212222103. The reversal of 20221212222100 is 122221212202.

It is an interprime number because it is at equal distance from previous prime (20221212222097) and next prime (20221212222103).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221212222103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14460544 + ... + 15797143.

It is an arithmetic number, because the mean of its divisors is an integer number (628139516984).

Almost surely, 2^{20221212222100} is an apocalyptic number.

20221212222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221212222100 is an abundant number, since it is smaller than the sum of its proper divisors (25004833000748).

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

20221212222100 is a wasteful number, since it uses less digits than its factorization.

20221212222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30257905 (or 30257898 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20221212222100 its reverse (122221212202), we get a palindrome (20343433434302).

The spelling of 20221212222100 in words is "twenty trillion, two hundred twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, one hundred".