22121011109977 has 4 divisors (see below), whose sum is σ = 23822627349220. Its totient is φ = 20419394870736.

The previous prime is 22121011109959. The next prime is 22121011109983. The reversal of 22121011109977 is 77990111012122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7719373197376 + 14401637912601 = 2778376^2 + 3794949^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121011109977 - 2³¹ = 22118863626329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121011109917) 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, 850808119602 + ... + 850808119627.

It is an arithmetic number, because the mean of its divisors is an integer number (5955656837305).

Almost surely, 2^{22121011109977} is an apocalyptic number.

It is an amenable number.

22121011109977 is a deficient number, since it is larger than the sum of its proper divisors (1701616239243).

22121011109977 is a wasteful number, since it uses less digits than its factorization.

22121011109977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701616239242.

The product of its (nonzero) digits is 31752, while the sum is 43.

The spelling of 22121011109977 in words is "twenty-two trillion, one hundred twenty-one billion, eleven million, one hundred nine thousand, nine hundred seventy-seven".