20100112221020 has 48 divisors (see below), whose sum is σ = 45460996442400. Its totient is φ = 7420956293376.

The previous prime is 20100112221001. The next prime is 20100112221029. The reversal of 20100112221020 is 2012221100102.

It is a super-2 number, since 2×20100112221020² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20100112220986 and 20100112221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100112221029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141995 + ... + 6341954.

It is an arithmetic number, because the mean of its divisors is an integer number (947104092550).

Almost surely, 2^{20100112221020} is an apocalyptic number.

20100112221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100112221020 is an abundant number, since it is smaller than the sum of its proper divisors (25360884221380).

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

20100112221020 is a wasteful number, since it uses less digits than its factorization.

20100112221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6495894 (or 6495892 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20100112221020 its reverse (2012221100102), we get a palindrome (22112333321122).

The spelling of 20100112221020 in words is "twenty trillion, one hundred billion, one hundred twelve million, two hundred twenty-one thousand, twenty".