121005202001 has 4 divisors (see below), whose sum is σ = 121200687600. Its totient is φ = 120809716404.

The previous prime is 121005201929. The next prime is 121005202027. The reversal of 121005202001 is 100202500121.

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 121005202001 - 2³⁰ = 119931460177 is a prime.

It is a super-2 number, since 2×121005202001² (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 (121005205001) 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, 97741871 + ... + 97743108.

It is an arithmetic number, because the mean of its divisors is an integer number (30300171900).

Almost surely, 2^121005202001 is an apocalyptic number.

It is an amenable number.

121005202001 is a deficient number, since it is larger than the sum of its proper divisors (195485599).

121005202001 is an equidigital number, since it uses as much as digits as its factorization.

121005202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195485598.

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 121005202001 its reverse (100202500121), we get a palindrome (221207702122).

The spelling of 121005202001 in words is "one hundred twenty-one billion, five million, two hundred two thousand, one".