20211112212102 has 144 divisors (see below), whose sum is σ = 51487718503104. Its totient is φ = 5712638400000.

The previous prime is 20211112212079. The next prime is 20211112212197. The reversal of 20211112212102 is 20121221111202.

20211112212102 is a `hidden beast` number, since 20 + 211 + 1 + 1 + 221 + 210 + 2 = 666.

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 71 ways as a sum of consecutive naturals, for example, 106893027 + ... + 107081937.

It is an arithmetic number, because the mean of its divisors is an integer number (357553600716).

Almost surely, 2^{20211112212102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20211112212102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25743859251552).

20211112212102 is an abundant number, since it is smaller than the sum of its proper divisors (31276606291002).

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

20211112212102 is a wasteful number, since it uses less digits than its factorization.

20211112212102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190235 (or 190225 counting only the distinct ones).

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

Adding to 20211112212102 its reverse (20121221111202), we get a palindrome (40332333323304).

The spelling of 20211112212102 in words is "twenty trillion, two hundred eleven billion, one hundred twelve million, two hundred twelve thousand, one hundred two".