22155160721 has 8 divisors (see below), whose sum is σ = 22269541920. Its totient is φ = 22041034272.

The previous prime is 22155160681. The next prime is 22155160723. The reversal of 22155160721 is 12706155122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22155160721 - 2¹⁴ = 22155144337 is a prime.

It is a super-2 number, since 2×22155160721² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22155160723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111941 + ... + 238413.

It is an arithmetic number, because the mean of its divisors is an integer number (2783692740).

Almost surely, 2^22155160721 is an apocalyptic number.

It is an amenable number.

22155160721 is a deficient number, since it is larger than the sum of its proper divisors (114381199).

22155160721 is a wasteful number, since it uses less digits than its factorization.

22155160721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127375.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 22155160721 in words is "twenty-two billion, one hundred fifty-five million, one hundred sixty thousand, seven hundred twenty-one".