121200102220220 has 24 divisors (see below), whose sum is σ = 269491991996304. Its totient is φ = 45628273776896.

The previous prime is 121200102220187. The next prime is 121200102220231. The reversal of 121200102220220 is 22022201002121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

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, 178235444102 + ... + 178235444781.

It is an arithmetic number, because the mean of its divisors is an integer number (11228832999846).

Almost surely, 2^{121200102220220} is an apocalyptic number.

121200102220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200102220220 is an abundant number, since it is smaller than the sum of its proper divisors (148291889776084).

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

121200102220220 is a wasteful number, since it uses less digits than its factorization.

121200102220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356470888909 (or 356470888907 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121200102220220 its reverse (22022201002121), we get a palindrome (143222303222341).

The spelling of 121200102220220 in words is "one hundred twenty-one trillion, two hundred billion, one hundred two million, two hundred twenty thousand, two hundred twenty".