22120051 has 4 divisors (see below), whose sum is σ = 22130992. Its totient is φ = 22109112.

The previous prime is 22120031. The next prime is 22120057. The reversal of 22120051 is 15002122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 15002122 = 2 ⋅7501061.

It is a cyclic number.

It is not a de Polignac number, because 22120051 - 2¹⁷ = 21988979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22120057) 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, 1455 + ... + 6808.

It is an arithmetic number, because the mean of its divisors is an integer number (5532748).

Almost surely, 2^22120051 is an apocalyptic number.

22120051 is a deficient number, since it is larger than the sum of its proper divisors (10941).

22120051 is an equidigital number, since it uses as much as digits as its factorization.

22120051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10940.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 22120051 is about 4703.1958283703. The cubic root of 22120051 is about 280.7126870021.

Adding to 22120051 its reverse (15002122), we get a palindrome (37122173).

The spelling of 22120051 in words is "twenty-two million, one hundred twenty thousand, fifty-one".