121002221222100 has 216 divisors, whose sum is σ = 398584143877920. Its totient is φ = 30665050295040.

The previous prime is 121002221222089. The next prime is 121002221222107. The reversal of 121002221222100 is 1222122200121.

It is a happy number.

121002221222100 is a `hidden beast` number, since 1 + 210 + 0 + 2 + 221 + 22 + 210 + 0 = 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 (121002221222107) 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, 40820430 + ... + 43684229.

Almost surely, 2^{121002221222100} is an apocalyptic number.

121002221222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002221222100 is an abundant number, since it is smaller than the sum of its proper divisors (277581922655820).

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

121002221222100 is a wasteful number, since it uses less digits than its factorization.

121002221222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84504759 (or 84504749 counting only the distinct ones).

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

Adding to 121002221222100 its reverse (1222122200121), we get a palindrome (122224343422221).

The spelling of 121002221222100 in words is "one hundred twenty-one trillion, two billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred".