121201101012100 has 36 divisors (see below), whose sum is σ = 263976892536448. Its totient is φ = 48301545780000.

The previous prime is 121201101012049. The next prime is 121201101012119. The reversal of 121201101012100 is 1210101102121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2236155576 + ... + 2236209775.

Almost surely, 2^{121201101012100} is an apocalyptic number.

121201101012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201101012100 is an abundant number, since it is smaller than the sum of its proper divisors (142775791524348).

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

121201101012100 is a wasteful number, since it uses less digits than its factorization.

121201101012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4472365636 (or 4472365629 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121201101012100 its reverse (1210101102121), we get a palindrome (122411202114221).

The spelling of 121201101012100 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred one million, twelve thousand, one hundred".