121021221022200 has 144 divisors (see below), whose sum is σ = 407865749314920. Its totient is φ = 32158288984320.

The previous prime is 121021221022187. The next prime is 121021221022213. The reversal of 121021221022200 is 2220122120121.

It is a happy number.

121021221022200 is a `hidden beast` number, since 1 + 21 + 0 + 212 + 210 + 2 + 220 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (121021221022187) and next prime (121021221022213).

It is a super-2 number, since 2×121021221022200² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 118278607 + ... + 119297406.

Almost surely, 2^{121021221022200} is an apocalyptic number.

121021221022200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021221022200 is an abundant number, since it is smaller than the sum of its proper divisors (286844528292720).

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

121021221022200 is a wasteful number, since it uses less digits than its factorization.

121021221022200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237576318 (or 237576306 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121021221022200 its reverse (2220122120121), we get a palindrome (123241343142321).

The spelling of 121021221022200 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred twenty-one million, twenty-two thousand, two hundred".