121020010021001 has 16 divisors (see below), whose sum is σ = 149727535577088. Its totient is φ = 95250775953600.

The previous prime is 121020010020901. The next prime is 121020010021007. The reversal of 121020010021001 is 100120010020121.

It is a cyclic number.

It is not a de Polignac number, because 121020010021001 - 2²² = 121020005826697 is a prime.

It is a super-2 number, since 2×121020010021001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121020010021007) 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 15 ways as a sum of consecutive naturals, for example, 3481370630 + ... + 3481405391.

It is an arithmetic number, because the mean of its divisors is an integer number (9357970973568).

Almost surely, 2^{121020010021001} is an apocalyptic number.

It is an amenable number.

121020010021001 is a deficient number, since it is larger than the sum of its proper divisors (28707525556087).

121020010021001 is a wasteful number, since it uses less digits than its factorization.

121020010021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6962776232.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121020010021001 its reverse (100120010020121), we get a palindrome (221140020041122).

The spelling of 121020010021001 in words is "one hundred twenty-one trillion, twenty billion, ten million, twenty-one thousand, one".