121031202100 has 18 divisors (see below), whose sum is σ = 262637708774. Its totient is φ = 48412480800.

The previous prime is 121031202059. The next prime is 121031202101. The reversal of 121031202100 is 1202130121.

It can be written as a sum of positive squares in 3 ways, for example, as 11002331664 + 110028870436 = 104892^2 + 331706^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121031202101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 605155911 + ... + 605156110.

Almost surely, 2^121031202100 is an apocalyptic number.

121031202100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121031202100 is an abundant number, since it is smaller than the sum of its proper divisors (141606506674).

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

121031202100 is a wasteful number, since it uses less digits than its factorization.

121031202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210312035 (or 1210312028 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121031202100 its reverse (1202130121), we get a palindrome (122233332221).

The spelling of 121031202100 in words is "one hundred twenty-one billion, thirty-one million, two hundred two thousand, one hundred".