11122221210021 has 12 divisors (see below), whose sum is σ = 16086822697920. Its totient is φ = 7404940881000.

The previous prime is 11122221209933. The next prime is 11122221210031. The reversal of 11122221210021 is 12001212222111.

11122221210021 is a `hidden beast` number, since 111 + 222 + 212 + 100 + 21 = 666.

It is not a de Polignac number, because 11122221210021 - 2⁷ = 11122221209893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11122221209976 and 11122221210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122221210031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 822764451 + ... + 822777968.

It is an arithmetic number, because the mean of its divisors is an integer number (1340568558160).

Almost surely, 2^{11122221210021} is an apocalyptic number.

It is an amenable number.

11122221210021 is a deficient number, since it is larger than the sum of its proper divisors (4964601487899).

11122221210021 is a wasteful number, since it uses less digits than its factorization.

11122221210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645543176 (or 1645543173 counting only the distinct ones).

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

Adding to 11122221210021 its reverse (12001212222111), we get a palindrome (23123433432132).

The spelling of 11122221210021 in words is "eleven trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred ten thousand, twenty-one".