22021097 has 8 divisors (see below), whose sum is σ = 26261376. Its totient is φ = 18054432.

The previous prime is 22021093. The next prime is 22021123. The reversal of 22021097 is 79012022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22021097 - 2² = 22021093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22021093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68228 + ... + 68549.

It is an arithmetic number, because the mean of its divisors is an integer number (3282672).

Almost surely, 2^22021097 is an apocalyptic number.

It is an amenable number.

22021097 is a deficient number, since it is larger than the sum of its proper divisors (4240279).

22021097 is a wasteful number, since it uses less digits than its factorization.

22021097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136807.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 22021097 is about 4692.6641686786. The cubic root of 22021097 is about 280.2934720621.

The spelling of 22021097 in words is "twenty-two million, twenty-one thousand, ninety-seven".