22013121 has 16 divisors (see below), whose sum is σ = 31711680. Its totient is φ = 13502400.

The previous prime is 22013081. The next prime is 22013137. The reversal of 22013121 is 12131022.

It is not a de Polignac number, because 22013121 - 2¹⁰ = 22012097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22013097 and 22013106.

It is not an unprimeable number, because it can be changed into a prime (22013161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14446 + ... + 15896.

It is an arithmetic number, because the mean of its divisors is an integer number (1981980).

Almost surely, 2^22013121 is an apocalyptic number.

It is an amenable number.

22013121 is a deficient number, since it is larger than the sum of its proper divisors (9698559).

22013121 is a wasteful number, since it uses less digits than its factorization.

22013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 22013121 is about 4691.8142546354. The cubic root of 22013121 is about 280.2596273858.

Adding to 22013121 its reverse (12131022), we get a palindrome (34144143).

The spelling of 22013121 in words is "twenty-two million, thirteen thousand, one hundred twenty-one".