121021021020001 has 4 divisors (see below), whose sum is σ = 124924924923904. Its totient is φ = 117117117116100.

The previous prime is 121021021019993. The next prime is 121021021020017. The reversal of 121021021020001 is 100020120120121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121021021020001 - 2³ = 121021021019993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021021020061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1951951951905 + ... + 1951951951966.

It is an arithmetic number, because the mean of its divisors is an integer number (31231231230976).

Almost surely, 2^{121021021020001} is an apocalyptic number.

It is an amenable number.

121021021020001 is a deficient number, since it is larger than the sum of its proper divisors (3903903903903).

121021021020001 is an equidigital number, since it uses as much as digits as its factorization.

121021021020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903903903902.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121021021020001 its reverse (100020120120121), we get a palindrome (221041141140122).

The spelling of 121021021020001 in words is "one hundred twenty-one trillion, twenty-one billion, twenty-one million, twenty thousand, one".