121021112001 has 4 divisors (see below), whose sum is σ = 161361482672. Its totient is φ = 80680741332.

The previous prime is 121021111993. The next prime is 121021112011. The reversal of 121021112001 is 100211120121.

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 not a de Polignac number, because 121021112001 - 2³ = 121021111993 is a prime.

It is a super-2 number, since 2×121021112001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121021112011) 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, 20170185331 + ... + 20170185336.

It is an arithmetic number, because the mean of its divisors is an integer number (40340370668).

Almost surely, 2^121021112001 is an apocalyptic number.

It is an amenable number.

121021112001 is a deficient number, since it is larger than the sum of its proper divisors (40340370671).

121021112001 is an equidigital number, since it uses as much as digits as its factorization.

121021112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40340370670.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121021112001 its reverse (100211120121), we get a palindrome (221232232122).

The spelling of 121021112001 in words is "one hundred twenty-one billion, twenty-one million, one hundred twelve thousand, one".