121201100212122 has 80 divisors (see below), whose sum is σ = 328634916033600. Its totient is φ = 32591892488832.

The previous prime is 121201100212121. The next prime is 121201100212193. The reversal of 121201100212122 is 221212001102121.

121201100212122 is a `hidden beast` number, since 121 + 201 + 10 + 0 + 212 + 122 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 121201100212095 and 121201100212104.

It is not an unprimeable number, because it can be changed into a prime (121201100212121) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3143488872 + ... + 3143527427.

It is an arithmetic number, because the mean of its divisors is an integer number (4107936450420).

Almost surely, 2^{121201100212122} is an apocalyptic number.

121201100212122 is an abundant number, since it is smaller than the sum of its proper divisors (207433815821478).

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

121201100212122 is a wasteful number, since it uses less digits than its factorization.

121201100212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6287016337 (or 6287016328 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121201100212122 its reverse (221212001102121), we get a palindrome (342413101314243).

The spelling of 121201100212122 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred million, two hundred twelve thousand, one hundred twenty-two".