22149121 has 2 divisors, whose sum is σ = 22149122. Its totient is φ = 22149120.

The previous prime is 22149091. The next prime is 22149137. The reversal of 22149121 is 12194122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20430400 + 1718721 = 4520^2 + 1311^2 .

It is a cyclic number.

It is not a de Polignac number, because 22149121 - 2¹⁷ = 22018049 is a prime.

It is a super-2 number, since 2×22149121² = 981167122145282, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22149092 and 22149101.

It is not a weakly prime, because it can be changed into another prime (22140121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11074560 + 11074561.

It is an arithmetic number, because the mean of its divisors is an integer number (11074561).

Almost surely, 2^22149121 is an apocalyptic number.

It is an amenable number.

22149121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22149121 is an equidigital number, since it uses as much as digits as its factorization.

22149121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 22.

The square root of 22149121 is about 4706.2852654721. The cubic root of 22149121 is about 280.8356033202.

The spelling of 22149121 in words is "twenty-two million, one hundred forty-nine thousand, one hundred twenty-one".