21201111011022 has 32 divisors (see below), whose sum is σ = 43097701704480. Its totient is φ = 6951125665920.

The previous prime is 21201111010969. The next prime is 21201111011077. The reversal of 21201111011022 is 22011011110212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21201111010992 and 21201111011010.

It is a congruent number.

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, 77005504 + ... + 77280332.

It is an arithmetic number, because the mean of its divisors is an integer number (1346803178265).

Almost surely, 2^{21201111011022} is an apocalyptic number.

21201111011022 is an abundant number, since it is smaller than the sum of its proper divisors (21896590693458).

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

21201111011022 is a wasteful number, since it uses less digits than its factorization.

21201111011022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485668.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21201111011022 its reverse (22011011110212), we get a palindrome (43212122121234).

The spelling of 21201111011022 in words is "twenty-one trillion, two hundred one billion, one hundred eleven million, eleven thousand, twenty-two".