20222121012 has 72 divisors (see below), whose sum is σ = 48409613280. Its totient is φ = 6570083520.

The previous prime is 20222120977. The next prime is 20222121047. The reversal of 20222121012 is 21012122202.

It is an interprime number because it is at equal distance from previous prime (20222120977) and next prime (20222121047).

It is a junction number, because it is equal to n+sod(n) for n = 20222120982 and 20222121000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19058962 + ... + 19060022.

It is an arithmetic number, because the mean of its divisors is an integer number (672355740).

Almost surely, 2^20222121012 is an apocalyptic number.

It is an amenable number.

20222121012 is an abundant number, since it is smaller than the sum of its proper divisors (28187492268).

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

20222121012 is a wasteful number, since it uses less digits than its factorization.

20222121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013 (or 1968 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20222121012 its reverse (21012122202), we get a palindrome (41234243214).

The spelling of 20222121012 in words is "twenty billion, two hundred twenty-two million, one hundred twenty-one thousand, twelve".