20213122412 has 48 divisors (see below), whose sum is σ = 42597085440. Its totient is φ = 8198511552.

The previous prime is 20213122403. The next prime is 20213122427. The reversal of 20213122412 is 21422131202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520163 + ... + 557669.

It is an arithmetic number, because the mean of its divisors is an integer number (887439280).

Almost surely, 2^20213122412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20213122412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21298542720).

20213122412 is an abundant number, since it is smaller than the sum of its proper divisors (22383963028).

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

20213122412 is a wasteful number, since it uses less digits than its factorization.

20213122412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38550 (or 38548 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20213122412 its reverse (21422131202), we get a palindrome (41635253614).

The spelling of 20213122412 in words is "twenty billion, two hundred thirteen million, one hundred twenty-two thousand, four hundred twelve".