7371399771221 has 4 divisors (see below), whose sum is σ = 7691895413472. Its totient is φ = 7050904128972.

The previous prime is 7371399771193. The next prime is 7371399771227. The reversal of 7371399771221 is 1221779931737.

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 7371399771221 - 2¹⁸ = 7371399509077 is a prime.

It is a super-2 number, since 2×7371399771221² (a number of 27 digits) 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 (7371399771227) 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, 160247821091 + ... + 160247821136.

It is an arithmetic number, because the mean of its divisors is an integer number (1922973853368).

Almost surely, 2^{7371399771221} is an apocalyptic number.

It is an amenable number.

7371399771221 is a deficient number, since it is larger than the sum of its proper divisors (320495642251).

7371399771221 is a wasteful number, since it uses less digits than its factorization.

7371399771221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320495642250.

The product of its digits is 7001316, while the sum is 59.

The spelling of 7371399771221 in words is "seven trillion, three hundred seventy-one billion, three hundred ninety-nine million, seven hundred seventy-one thousand, two hundred twenty-one".