2151323151121 has 4 divisors (see below), whose sum is σ = 2183432451952. Its totient is φ = 2119213850292.

The previous prime is 2151323151079. The next prime is 2151323151143. The reversal of 2151323151121 is 1211513231512.

It is a happy number.

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 2151323151121 - 2⁷ = 2151323150993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2151323151121.

It is not an unprimeable number, because it can be changed into a prime (2151323151221) 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, 16054650315 + ... + 16054650448.

It is an arithmetic number, because the mean of its divisors is an integer number (545858112988).

Almost surely, 2^{2151323151121} is an apocalyptic number.

It is an amenable number.

2151323151121 is a deficient number, since it is larger than the sum of its proper divisors (32109300831).

2151323151121 is an equidigital number, since it uses as much as digits as its factorization.

2151323151121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32109300830.

The product of its digits is 1800, while the sum is 28.

Adding to 2151323151121 its reverse (1211513231512), we get a palindrome (3362836382633).

The spelling of 2151323151121 in words is "two trillion, one hundred fifty-one billion, three hundred twenty-three million, one hundred fifty-one thousand, one hundred twenty-one".