121101112202100 has 72 divisors (see below), whose sum is σ = 350624081622528. Its totient is φ = 32271676281600.

The previous prime is 121101112202099. The next prime is 121101112202117. The reversal of 121101112202100 is 1202211101121.

It is a happy number.

It is a super-2 number, since 2×121101112202100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121101112202100.

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, 136768209 + ... + 137650808.

It is an arithmetic number, because the mean of its divisors is an integer number (4869778911424).

Almost surely, 2^{121101112202100} is an apocalyptic number.

121101112202100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101112202100 is an abundant number, since it is smaller than the sum of its proper divisors (229522969420428).

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

121101112202100 is a wasteful number, since it uses less digits than its factorization.

121101112202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274420505 (or 274420498 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121101112202100 its reverse (1202211101121), we get a palindrome (122303323303221).

The spelling of 121101112202100 in words is "one hundred twenty-one trillion, one hundred one billion, one hundred twelve million, two hundred two thousand, one hundred".