22121477 has 4 divisors (see below), whose sum is σ = 25281696. Its totient is φ = 18961260.

The previous prime is 22121447. The next prime is 22121483. The reversal of 22121477 is 77412122.

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 22121477 - 2¹⁸ = 21859333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121447) 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, 1580099 + ... + 1580112.

It is an arithmetic number, because the mean of its divisors is an integer number (6320424).

Almost surely, 2^22121477 is an apocalyptic number.

It is an amenable number.

22121477 is a deficient number, since it is larger than the sum of its proper divisors (3160219).

22121477 is an equidigital number, since it uses as much as digits as its factorization.

22121477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160218.

The product of its digits is 1568, while the sum is 26.

The square root of 22121477 is about 4703.3474249730. The cubic root of 22121477 is about 280.7187190510.

Adding to 22121477 its reverse (77412122), we get a palindrome (99533599).

The spelling of 22121477 in words is "twenty-two million, one hundred twenty-one thousand, four hundred seventy-seven".