120001000002121 has 4 divisors (see below), whose sum is σ = 137144000002432. Its totient is φ = 102858000001812.

The previous prime is 120001000002113. The next prime is 120001000002157. The reversal of 120001000002121 is 121200000100021.

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 120001000002121 - 2³ = 120001000002113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120001000002098 and 120001000002107.

It is not an unprimeable number, because it can be changed into a prime (120001000002181) 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, 8571500000145 + ... + 8571500000158.

It is an arithmetic number, because the mean of its divisors is an integer number (34286000000608).

Almost surely, 2^{120001000002121} is an apocalyptic number.

It is an amenable number.

120001000002121 is a deficient number, since it is larger than the sum of its proper divisors (17143000000311).

120001000002121 is an equidigital number, since it uses as much as digits as its factorization.

120001000002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17143000000310.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 120001000002121 its reverse (121200000100021), we get a palindrome (241201000102142).

The spelling of 120001000002121 in words is "one hundred twenty trillion, one billion, two thousand, one hundred twenty-one".