121221212022001 has 32 divisors (see below), whose sum is σ = 149727811903488. Its totient is φ = 95569201304640.

The previous prime is 121221212021993. The next prime is 121221212022017. The reversal of 121221212022001 is 100220212122121.

It is not a de Polignac number, because 121221212022001 - 2³ = 121221212021993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121221212022001.

It is not an unprimeable number, because it can be changed into a prime (121221212023001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79706440 + ... + 81213046.

It is an arithmetic number, because the mean of its divisors is an integer number (4678994121984).

Almost surely, 2^{121221212022001} is an apocalyptic number.

It is an amenable number.

121221212022001 is a deficient number, since it is larger than the sum of its proper divisors (28506599881487).

121221212022001 is a wasteful number, since it uses less digits than its factorization.

121221212022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509781.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121221212022001 its reverse (100220212122121), we get a palindrome (221441424144122).

The spelling of 121221212022001 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twelve million, twenty-two thousand, one".