121200020201220 has 24 divisors (see below), whose sum is σ = 339360056563584. Its totient is φ = 32320005386976.

The previous prime is 121200020201219. The next prime is 121200020201317. The reversal of 121200020201220 is 22102020002121.

It is a super-2 number, since 2×121200020201220² (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 self number, because there is not a number n which added to its sum of digits gives 121200020201220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1010000168284 + ... + 1010000168403.

It is an arithmetic number, because the mean of its divisors is an integer number (14140002356816).

Almost surely, 2^{121200020201220} is an apocalyptic number.

121200020201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200020201220 is an abundant number, since it is smaller than the sum of its proper divisors (218160036362364).

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

121200020201220 is a wasteful number, since it uses less digits than its factorization.

121200020201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020000336699 (or 2020000336697 counting only the distinct ones).

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

Adding to 121200020201220 its reverse (22102020002121), we get a palindrome (143302040203341).

The spelling of 121200020201220 in words is "one hundred twenty-one trillion, two hundred billion, twenty million, two hundred one thousand, two hundred twenty".