121202210222100 has 216 divisors, whose sum is σ = 457024475019840. Its totient is φ = 26245290608640.

The previous prime is 121202210222077. The next prime is 121202210222101. The reversal of 121202210222100 is 1222012202121.

It is a happy number.

121202210222100 is a `hidden beast` number, since 1 + 2 + 120 + 221 + 0 + 222 + 100 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202210222101) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 506155197 + ... + 506394596.

Almost surely, 2^{121202210222100} is an apocalyptic number.

121202210222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121202210222100 is an abundant number, since it is smaller than the sum of its proper divisors (335822264797740).

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

121202210222100 is a wasteful number, since it uses less digits than its factorization.

121202210222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012549839 (or 1012549829 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121202210222100 its reverse (1222012202121), we get a palindrome (122424222424221).

The spelling of 121202210222100 in words is "one hundred twenty-one trillion, two hundred two billion, two hundred ten million, two hundred twenty-two thousand, one hundred".