121121201112100 has 36 divisors (see below), whose sum is σ = 300380578759744. Its totient is φ = 41527268952480.

The previous prime is 121121201112071. The next prime is 121121201112139. The reversal of 121121201112100 is 1211102121121.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86515142952 + ... + 86515144351.

Almost surely, 2^{121121201112100} is an apocalyptic number.

121121201112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121201112100 is an abundant number, since it is smaller than the sum of its proper divisors (179259377647644).

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

121121201112100 is a wasteful number, since it uses less digits than its factorization.

121121201112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173030287324 (or 173030287317 counting only the distinct ones).

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

Adding to 121121201112100 its reverse (1211102121121), we get a palindrome (122332303233221).

The spelling of 121121201112100 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred one million, one hundred twelve thousand, one hundred".