22111001020 has 24 divisors (see below), whose sum is σ = 46744740000. Its totient is φ = 8785040832.

The previous prime is 22111001009. The next prime is 22111001063. The reversal of 22111001020 is 2010011122.

It is a super-2 number, since 2×22111001020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 22111000988 and 22111001006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3706920 + ... + 3712879.

It is an arithmetic number, because the mean of its divisors is an integer number (1947697500).

Almost surely, 2^22111001020 is an apocalyptic number.

22111001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22111001020 is an abundant number, since it is smaller than the sum of its proper divisors (24633738980).

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

22111001020 is a wasteful number, since it uses less digits than its factorization.

22111001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7419957 (or 7419955 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 22111001020 its reverse (2010011122), we get a palindrome (24121012142).

The spelling of 22111001020 in words is "twenty-two billion, one hundred eleven million, one thousand, twenty".