7121161155 has 16 divisors (see below), whose sum is σ = 11701800864. Its totient is φ = 3695304960.

The previous prime is 7121161153. The next prime is 7121161163. The reversal of 7121161155 is 5511611217.

It is not a de Polignac number, because 7121161155 - 2¹ = 7121161153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7121161153) 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, 6414906 + ... + 6416015.

It is an arithmetic number, because the mean of its divisors is an integer number (731362554).

Almost surely, 2^7121161155 is an apocalyptic number.

7121161155 is a deficient number, since it is larger than the sum of its proper divisors (4580639709).

7121161155 is a wasteful number, since it uses less digits than its factorization.

7121161155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12830966.

The product of its digits is 2100, while the sum is 30.

The square root of 7121161155 is about 84386.9726616615. The cubic root of 7121161155 is about 1923.9049176051.

The spelling of 7121161155 in words is "seven billion, one hundred twenty-one million, one hundred sixty-one thousand, one hundred fifty-five".