20212111111122 has 384 divisors, whose sum is σ = 55842412953600. Its totient is φ = 5150528684928.

The previous prime is 20212111111067. The next prime is 20212111111139. The reversal of 20212111111122 is 22111111121202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20212111111095 and 20212111111104.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7522183663 + ... + 7522186349.

It is an arithmetic number, because the mean of its divisors is an integer number (145422950400).

Almost surely, 2^{20212111111122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20212111111122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27921206476800).

20212111111122 is an abundant number, since it is smaller than the sum of its proper divisors (35630301842478).

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

20212111111122 is a wasteful number, since it uses less digits than its factorization.

20212111111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4850 (or 4847 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 20212111111122 its reverse (22111111121202), we get a palindrome (42323222232324).

The spelling of 20212111111122 in words is "twenty trillion, two hundred twelve billion, one hundred eleven million, one hundred eleven thousand, one hundred twenty-two".