121222112020100 has 144 divisors (see below), whose sum is σ = 325694951355648. Its totient is φ = 38135070466560.

The previous prime is 121222112020081. The next prime is 121222112020103. The reversal of 121222112020100 is 1020211222121.

It is a super-2 number, since 2×121222112020100² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121222112020103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38363867 + ... + 41403266.

Almost surely, 2^{121222112020100} is an apocalyptic number.

121222112020100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222112020100 is an abundant number, since it is smaller than the sum of its proper divisors (204472839335548).

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

121222112020100 is a wasteful number, since it uses less digits than its factorization.

121222112020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79767334 (or 79767327 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121222112020100 its reverse (1020211222121), we get a palindrome (122242323242221).

The spelling of 121222112020100 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred twelve million, twenty thousand, one hundred".