20012223100 has 36 divisors (see below), whose sum is σ = 45712135000. Its totient is φ = 7583578560.

The previous prime is 20012223097. The next prime is 20012223103. The reversal of 20012223100 is 132221002.

It is an interprime number because it is at equal distance from previous prime (20012223097) and next prime (20012223103).

It is a super-2 number, since 2×20012223100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012223103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5264475 + ... + 5268274.

Almost surely, 2^20012223100 is an apocalyptic number.

20012223100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012223100 is an abundant number, since it is smaller than the sum of its proper divisors (25699911900).

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

20012223100 is a wasteful number, since it uses less digits than its factorization.

20012223100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10532782 (or 10532775 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20012223100 its reverse (132221002), we get a palindrome (20144444102).

The spelling of 20012223100 in words is "twenty billion, twelve million, two hundred twenty-three thousand, one hundred".