20123222100 has 72 divisors (see below), whose sum is σ = 60754653120. Its totient is φ = 5132878080.

The previous prime is 20123222089. The next prime is 20123222111. The reversal of 20123222100 is 122232102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20123222089) and next prime (20123222111).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20123222100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1451305 + ... + 1465104.

Almost surely, 2^20123222100 is an apocalyptic number.

20123222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123222100 is an abundant number, since it is smaller than the sum of its proper divisors (40631431020).

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

20123222100 is a wasteful number, since it uses less digits than its factorization.

20123222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916449 (or 2916442 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20123222100 its reverse (122232102), we get a palindrome (20245454202).

The spelling of 20123222100 in words is "twenty billion, one hundred twenty-three million, two hundred twenty-two thousand, one hundred".