121201101100 has 36 divisors (see below), whose sum is σ = 263027392600. Its totient is φ = 48476568960.

The previous prime is 121201101089. The next prime is 121201101101. The reversal of 121201101100 is 1101102121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (121201101101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1436896 + ... + 1518904.

Almost surely, 2^121201101100 is an apocalyptic number.

121201101100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201101100 is an abundant number, since it is smaller than the sum of its proper divisors (141826291500).

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

121201101100 is a wasteful number, since it uses less digits than its factorization.

121201101100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96802 (or 96795 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121201101100 its reverse (1101102121), we get a palindrome (122302203221).

The spelling of 121201101100 in words is "one hundred twenty-one billion, two hundred one million, one hundred one thousand, one hundred".