121220020200 has 96 divisors (see below), whose sum is σ = 379430625600. Its totient is φ = 32011484160.

The previous prime is 121220020199. The next prime is 121220020261. The reversal of 121220020200 is 2020022121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 918945 + ... + 1042544.

It is an arithmetic number, because the mean of its divisors is an integer number (3952402350).

Almost surely, 2^121220020200 is an apocalyptic number.

121220020200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220020200 is an abundant number, since it is smaller than the sum of its proper divisors (258210605400).

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

121220020200 is a wasteful number, since it uses less digits than its factorization.

121220020200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961611 (or 1961602 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 121220020200 its reverse (2020022121), we get a palindrome (123240042321).

The spelling of 121220020200 in words is "one hundred twenty-one billion, two hundred twenty million, twenty thousand, two hundred".