76122021 has 4 divisors (see below), whose sum is σ = 101496032. Its totient is φ = 50748012.

The previous prime is 76122017. The next prime is 76122023. The reversal of 76122021 is 12022167.

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 not a de Polignac number, because 76122021 - 2² = 76122017 is a prime.

It is a super-2 number, since 2×76122021² = 11589124162248882, 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 (76122023) 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, 12687001 + ... + 12687006.

It is an arithmetic number, because the mean of its divisors is an integer number (25374008).

Almost surely, 2^76122021 is an apocalyptic number.

It is an amenable number.

76122021 is a deficient number, since it is larger than the sum of its proper divisors (25374011).

76122021 is a wasteful number, since it uses less digits than its factorization.

76122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25374010.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 76122021 is about 8724.7934646042. The cubic root of 76122021 is about 423.8089299445.

Adding to 76122021 its reverse (12022167), we get a palindrome (88144188).

The spelling of 76122021 in words is "seventy-six million, one hundred twenty-two thousand, twenty-one".