22111020 has 36 divisors (see below), whose sum is σ = 67070640. Its totient is φ = 5896224.

The previous prime is 22111007. The next prime is 22111039. The reversal of 22111020 is 2011122.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 22110993 and 22111011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61240 + ... + 61599.

Almost surely, 2^22111020 is an apocalyptic number.

22111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22111020 is an abundant number, since it is smaller than the sum of its proper divisors (44959620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22111020 is a wasteful number, since it uses less digits than its factorization.

22111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122854 (or 122849 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 22111020 is about 4702.2356385022. The cubic root of 22111020 is about 280.6744794145.

Adding to 22111020 its reverse (2011122), we get a palindrome (24122142).

The spelling of 22111020 in words is "twenty-two million, one hundred eleven thousand, twenty".