22101131 has 4 divisors (see below), whose sum is σ = 23801232. Its totient is φ = 20401032.

The previous prime is 22101113. The next prime is 22101143. The reversal of 22101131 is 13110122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22101131 is a prime.

It is a super-2 number, since 2×22101131² = 976919982958322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22101151) 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, 850031 + ... + 850056.

It is an arithmetic number, because the mean of its divisors is an integer number (5950308).

Almost surely, 2^22101131 is an apocalyptic number.

22101131 is a deficient number, since it is larger than the sum of its proper divisors (1700101).

22101131 is a wasteful number, since it uses less digits than its factorization.

22101131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700100.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 22101131 is about 4701.1839998026. The cubic root of 22101131 is about 280.6326299382.

Adding to 22101131 its reverse (13110122), we get a palindrome (35211253).

The spelling of 22101131 in words is "twenty-two million, one hundred one thousand, one hundred thirty-one".