22820121 has 12 divisors (see below), whose sum is σ = 34697520. Its totient is φ = 14412600.

The previous prime is 22820113. The next prime is 22820141. The reversal of 22820121 is 12102822.

It is a happy number.

It is not a de Polignac number, because 22820121 - 2³ = 22820113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22820094 and 22820103.

It is not an unprimeable number, because it can be changed into a prime (22820101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66555 + ... + 66896.

It is an arithmetic number, because the mean of its divisors is an integer number (2891460).

Almost surely, 2^22820121 is an apocalyptic number.

It is an amenable number.

22820121 is a deficient number, since it is larger than the sum of its proper divisors (11877399).

22820121 is a wasteful number, since it uses less digits than its factorization.

22820121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133476 (or 133473 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 22820121 is about 4777.0410297589. The cubic root of 22820121 is about 283.6433771744.

Adding to 22820121 its reverse (12102822), we get a palindrome (34922943).

The spelling of 22820121 in words is "twenty-two million, eight hundred twenty thousand, one hundred twenty-one".