220121200212100 has 72 divisors (see below), whose sum is σ = 521122562458848. Its totient is φ = 80038596844800.

The previous prime is 220121200212097. The next prime is 220121200212103. The reversal of 220121200212100 is 1212002121022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (220121200212097) and next prime (220121200212103).

It is not an unprimeable number, because it can be changed into a prime (220121200212103) 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, 9258667 + ... + 22933933.

It is an arithmetic number, because the mean of its divisors is an integer number (7237813367484).

Almost surely, 2^{220121200212100} is an apocalyptic number.

220121200212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121200212100 is an abundant number, since it is smaller than the sum of its proper divisors (301001362246748).

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

220121200212100 is a wasteful number, since it uses less digits than its factorization.

220121200212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13689925 (or 13689918 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220121200212100 its reverse (1212002121022), we get a palindrome (221333202333122).

It can be divided in two parts, 2 and 20121200212100, that added together give a palindrome (20121200212102).

The spelling of 220121200212100 in words is "two hundred twenty trillion, one hundred twenty-one billion, two hundred million, two hundred twelve thousand, one hundred".