21122104343177 has 4 divisors (see below), whose sum is σ = 21123693560016. Its totient is φ = 21120515126340.

The previous prime is 21122104343141. The next prime is 21122104343209. The reversal of 21122104343177 is 77134340122112.

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 21122104343177 - 2³² = 21117809375881 is a prime.

It is a super-2 number, since 2×21122104343177² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21122104343177.

It is not an unprimeable number, because it can be changed into a prime (21122104343477) 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, 794588483 + ... + 794615064.

It is an arithmetic number, because the mean of its divisors is an integer number (5280923390004).

Almost surely, 2^{21122104343177} is an apocalyptic number.

It is an amenable number.

21122104343177 is a deficient number, since it is larger than the sum of its proper divisors (1589216839).

21122104343177 is a wasteful number, since it uses less digits than its factorization.

21122104343177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589216838.

The product of its (nonzero) digits is 56448, while the sum is 38.

Adding to 21122104343177 its reverse (77134340122112), we get a palindrome (98256444465289).

The spelling of 21122104343177 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred four million, three hundred forty-three thousand, one hundred seventy-seven".