121220110203100 has 72 divisors (see below), whose sum is σ = 263493999742176. Its totient is φ = 48405782880000.

The previous prime is 121220110203061. The next prime is 121220110203113. The reversal of 121220110203100 is 1302011022121.

It is a super-2 number, since 2×121220110203100² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

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, 589314270 + ... + 589519930.

It is an arithmetic number, because the mean of its divisors is an integer number (3659638885308).

Almost surely, 2^{121220110203100} is an apocalyptic number.

121220110203100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220110203100 is an abundant number, since it is smaller than the sum of its proper divisors (142273889539076).

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

121220110203100 is a wasteful number, since it uses less digits than its factorization.

121220110203100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215647 (or 215640 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121220110203100 its reverse (1302011022121), we get a palindrome (122522121225221).

The spelling of 121220110203100 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred ten million, two hundred three thousand, one hundred".