2147121751 has 8 divisors (see below), whose sum is σ = 2154553344. Its totient is φ = 2139702360.

The previous prime is 2147121703. The next prime is 2147121763. The reversal of 2147121751 is 1571217412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2147121751 - 2²⁵ = 2113567319 is a prime.

It is a super-2 number, since 2×2147121751² = 9220263627234612002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147124751) 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 7 ways as a sum of consecutive naturals, for example, 466206 + ... + 470788.

It is an arithmetic number, because the mean of its divisors is an integer number (269319168).

Almost surely, 2^2147121751 is an apocalyptic number.

2147121751 is a deficient number, since it is larger than the sum of its proper divisors (7431593).

2147121751 is a wasteful number, since it uses less digits than its factorization.

2147121751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6101.

The product of its digits is 3920, while the sum is 31.

The square root of 2147121751 is about 46337.0451259033. The cubic root of 2147121751 is about 1290.0866778687.

The spelling of 2147121751 in words is "two billion, one hundred forty-seven million, one hundred twenty-one thousand, seven hundred fifty-one".