22212129977 has 8 divisors (see below), whose sum is σ = 23525850600. Its totient is φ = 20899201024.

The previous prime is 22212129931. The next prime is 22212129991. The reversal of 22212129977 is 77992121222.

It can be written as a sum of positive squares in 4 ways, for example, as 5956134976 + 16255995001 = 77176^2 + 127499^2 .

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 22212129977 - 2⁶ = 22212129913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22212129997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139652 + ... + 252837.

It is an arithmetic number, because the mean of its divisors is an integer number (2940731325).

Almost surely, 2^22212129977 is an apocalyptic number.

It is an amenable number.

22212129977 is a deficient number, since it is larger than the sum of its proper divisors (1313720623).

22212129977 is a wasteful number, since it uses less digits than its factorization.

22212129977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395835.

The product of its digits is 127008, while the sum is 44.

The spelling of 22212129977 in words is "twenty-two billion, two hundred twelve million, one hundred twenty-nine thousand, nine hundred seventy-seven".