2151001500121 has 4 divisors (see below), whose sum is σ = 2151005508112. Its totient is φ = 2150997492132.

The previous prime is 2151001500113. The next prime is 2151001500173. The reversal of 2151001500121 is 1210051001512.

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 2151001500121 - 2³ = 2151001500113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151001503121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046475 + ... + 2323168.

It is an arithmetic number, because the mean of its divisors is an integer number (537751377028).

Almost surely, 2^{2151001500121} is an apocalyptic number.

It is an amenable number.

2151001500121 is a deficient number, since it is larger than the sum of its proper divisors (4007991).

2151001500121 is an equidigital number, since it uses as much as digits as its factorization.

2151001500121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007990.

The product of its (nonzero) digits is 100, while the sum is 19.

Adding to 2151001500121 its reverse (1210051001512), we get a palindrome (3361052501633).

The spelling of 2151001500121 in words is "two trillion, one hundred fifty-one billion, one million, five hundred thousand, one hundred twenty-one".