121110220100 has 72 divisors (see below), whose sum is σ = 263556756288. Its totient is φ = 48306544000.

The previous prime is 121110220097. The next prime is 121110220139. The reversal of 121110220100 is 1022011121.

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, 93089450 + ... + 93090750.

It is an arithmetic number, because the mean of its divisors is an integer number (3660510504).

Almost surely, 2^121110220100 is an apocalyptic number.

121110220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121110220100 is an abundant number, since it is smaller than the sum of its proper divisors (142446536188).

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

121110220100 is a wasteful number, since it uses less digits than its factorization.

121110220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3245 (or 3238 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121110220100 its reverse (1022011121), we get a palindrome (122132231221).

The spelling of 121110220100 in words is "one hundred twenty-one billion, one hundred ten million, two hundred twenty thousand, one hundred".