7122156660061 has 4 divisors (see below), whose sum is σ = 7133233109632. Its totient is φ = 7111080210492.

The previous prime is 7122156660041. The next prime is 7122156660077. The reversal of 7122156660061 is 1600666512217.

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 7122156660061 - 2⁹ = 7122156659549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7122156660041) 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, 5538223821 + ... + 5538225106.

It is an arithmetic number, because the mean of its divisors is an integer number (1783308277408).

Almost surely, 2^{7122156660061} is an apocalyptic number.

It is an amenable number.

7122156660061 is a deficient number, since it is larger than the sum of its proper divisors (11076449571).

7122156660061 is a wasteful number, since it uses less digits than its factorization.

7122156660061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11076449570.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 7122156660061 in words is "seven trillion, one hundred twenty-two billion, one hundred fifty-six million, six hundred sixty thousand, sixty-one".