7121156112 has 120 divisors (see below), whose sum is σ = 24116242176. Its totient is φ = 1914928128.

The previous prime is 7121156093. The next prime is 7121156117. The reversal of 7121156112 is 2116511217.

7121156112 is a `hidden beast` number, since 71 + 21 + 1 + 561 + 12 = 666.

It is not an unprimeable number, because it can be changed into a prime (7121156117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190648 + ... + 224919.

Almost surely, 2^7121156112 is an apocalyptic number.

7121156112 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

7121156112 is an abundant number, since it is smaller than the sum of its proper divisors (16995086064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7121156112 is a wasteful number, since it uses less digits than its factorization.

7121156112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415605 (or 415596 counting only the distinct ones).

The product of its digits is 840, while the sum is 27.

The square root of 7121156112 is about 84386.9427814517. The cubic root of 7121156112 is about 1923.9044634538.

Adding to 7121156112 its reverse (2116511217), we get a palindrome (9237667329).

The spelling of 7121156112 in words is "seven billion, one hundred twenty-one million, one hundred fifty-six thousand, one hundred twelve".