20121200022 has 32 divisors (see below), whose sum is σ = 50172344064. Its totient is φ = 5226285600.

The previous prime is 20121199997. The next prime is 20121200053. The reversal of 20121200022 is 22000212102.

It is a junction number, because it is equal to n+sod(n) for n = 20121199980 and 20121200007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21775729 + ... + 21776652.

It is an arithmetic number, because the mean of its divisors is an integer number (1567885752).

Almost surely, 2^20121200022 is an apocalyptic number.

20121200022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20121200022 is an abundant number, since it is smaller than the sum of its proper divisors (30051144042).

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

20121200022 is a wasteful number, since it uses less digits than its factorization.

20121200022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43552404.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20121200022 its reverse (22000212102), we get a palindrome (42121412124).

The spelling of 20121200022 in words is "twenty billion, one hundred twenty-one million, two hundred thousand, twenty-two".