7861088121 has 16 divisors (see below), whose sum is σ = 10633835520. Its totient is φ = 5164599440.

The previous prime is 7861088089. The next prime is 7861088153. The reversal of 7861088121 is 1218801687.

It is an interprime number because it is at equal distance from previous prime (7861088089) and next prime (7861088153).

It is a cyclic number.

It is not a de Polignac number, because 7861088121 - 2⁵ = 7861088089 is a prime.

It is a super-2 number, since 2×7861088121² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7861088161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560290 + ... + 574148.

It is an arithmetic number, because the mean of its divisors is an integer number (664614720).

Almost surely, 2^7861088121 is an apocalyptic number.

7861088121 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

7861088121 is a deficient number, since it is larger than the sum of its proper divisors (2772747399).

7861088121 is a wasteful number, since it uses less digits than its factorization.

7861088121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16596.

The product of its (nonzero) digits is 43008, while the sum is 42.

The square root of 7861088121 is about 88662.7775393936. Note that the first 3 decimals coincide. The cubic root of 7861088121 is about 1988.3563543902.

The spelling of 7861088121 in words is "seven billion, eight hundred sixty-one million, eighty-eight thousand, one hundred twenty-one".