22121377 has 16 divisors (see below), whose sum is σ = 24514560. Its totient is φ = 19868112.

The previous prime is 22121371. The next prime is 22121381. The reversal of 22121377 is 77312122.

It is a cyclic number.

It is not a de Polignac number, because 22121377 - 2²³ = 13732769 is a prime.

It is a super-2 number, since 2×22121377² = 978710640752258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22121371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97338 + ... + 97564.

It is an arithmetic number, because the mean of its divisors is an integer number (1532160).

Almost surely, 2^22121377 is an apocalyptic number.

It is an amenable number.

22121377 is a deficient number, since it is larger than the sum of its proper divisors (2393183).

22121377 is a wasteful number, since it uses less digits than its factorization.

22121377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its digits is 1176, while the sum is 25.

The square root of 22121377 is about 4703.3367942345. The cubic root of 22121377 is about 280.7182960546.

Adding to 22121377 its reverse (77312122), we get a palindrome (99433499).

The spelling of 22121377 in words is "twenty-two million, one hundred twenty-one thousand, three hundred seventy-seven".