20112102022221 has 24 divisors (see below), whose sum is σ = 31705041041856. Its totient is φ = 12184058927040.

The previous prime is 20112102022219. The next prime is 20112102022231. The reversal of 20112102022221 is 12222020121102.

It is a happy number.

20112102022221 is a `hidden beast` number, since 20 + 11 + 210 + 202 + 2 + 221 = 666.

It is not a de Polignac number, because 20112102022221 - 2¹ = 20112102022219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20112102022194 and 20112102022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112102022231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42210345 + ... + 42684158.

It is an arithmetic number, because the mean of its divisors is an integer number (1321043376744).

Almost surely, 2^{20112102022221} is an apocalyptic number.

It is an amenable number.

20112102022221 is a deficient number, since it is larger than the sum of its proper divisors (11592939019635).

20112102022221 is a wasteful number, since it uses less digits than its factorization.

20112102022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84896913 (or 84896910 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20112102022221 its reverse (12222020121102), we get a palindrome (32334122143323).

The spelling of 20112102022221 in words is "twenty trillion, one hundred twelve billion, one hundred two million, twenty-two thousand, two hundred twenty-one".