121001222200020 has 48 divisors (see below), whose sum is σ = 338809774459968. Its totient is φ = 32266387605760.

The previous prime is 121001222200013. The next prime is 121001222200021. The reversal of 121001222200020 is 20002222100121.

It is a super-2 number, since 2×121001222200020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001222200021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15674289 + ... + 22083608.

It is an arithmetic number, because the mean of its divisors is an integer number (7058536967916).

Almost surely, 2^{121001222200020} is an apocalyptic number.

121001222200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121001222200020 is an abundant number, since it is smaller than the sum of its proper divisors (217808552259948).

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

121001222200020 is a wasteful number, since it uses less digits than its factorization.

121001222200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37811320 (or 37811318 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121001222200020 its reverse (20002222100121), we get a palindrome (141003444300141).

The spelling of 121001222200020 in words is "one hundred twenty-one trillion, one billion, two hundred twenty-two million, two hundred thousand, twenty".