20111202221112 has 96 divisors (see below), whose sum is σ = 55958385100800. Its totient is φ = 6520401752832.

The previous prime is 20111202221083. The next prime is 20111202221141. The reversal of 20111202221112 is 21112220211102.

20111202221112 is a `hidden beast` number, since 20 + 111 + 202 + 221 + 112 = 666.

It is an interprime number because it is at equal distance from previous prime (20111202221083) and next prime (20111202221141).

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

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, 6847689 + ... + 9333447.

It is an arithmetic number, because the mean of its divisors is an integer number (582899844800).

Almost surely, 2^{20111202221112} 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 20111202221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27979192550400).

20111202221112 is an abundant number, since it is smaller than the sum of its proper divisors (35847182879688).

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

20111202221112 is a wasteful number, since it uses less digits than its factorization.

20111202221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488845 (or 2488838 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20111202221112 its reverse (21112220211102), we get a palindrome (41223422432214).

The spelling of 20111202221112 in words is "twenty trillion, one hundred eleven billion, two hundred two million, two hundred twenty-one thousand, one hundred twelve".