5161711051021 has 4 divisors (see below), whose sum is σ = 5899098344032. Its totient is φ = 4424323758012.

The previous prime is 5161711051019. The next prime is 5161711051027. The reversal of 5161711051021 is 1201501171615.

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 5161711051021 - 2¹ = 5161711051019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5161711051027) 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, 368693646495 + ... + 368693646508.

It is an arithmetic number, because the mean of its divisors is an integer number (1474774586008).

Almost surely, 2^{5161711051021} is an apocalyptic number.

It is an amenable number.

5161711051021 is a deficient number, since it is larger than the sum of its proper divisors (737387293011).

5161711051021 is an equidigital number, since it uses as much as digits as its factorization.

5161711051021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737387293010.

The product of its (nonzero) digits is 2100, while the sum is 31.

The spelling of 5161711051021 in words is "five trillion, one hundred sixty-one billion, seven hundred eleven million, fifty-one thousand, twenty-one".