11221211022021 has 64 divisors (see below), whose sum is σ = 22320357642240. Its totient is φ = 5380800477120.

The previous prime is 11221211021983. The next prime is 11221211022037. The reversal of 11221211022021 is 12022011212211.

11221211022021 is a `hidden beast` number, since 11 + 221 + 211 + 0 + 220 + 2 + 1 = 666.

It is not a de Polignac number, because 11221211022021 - 2⁷ = 11221211021893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221211021985 and 11221211022003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221211022121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 207565585 + ... + 207619638.

It is an arithmetic number, because the mean of its divisors is an integer number (348755588160).

Almost surely, 2^{11221211022021} is an apocalyptic number.

11221211022021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221211022021 is a deficient number, since it is larger than the sum of its proper divisors (11099146620219).

11221211022021 is a wasteful number, since it uses less digits than its factorization.

11221211022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415185263 (or 415185257 counting only the distinct ones).

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

Adding to 11221211022021 its reverse (12022011212211), we get a palindrome (23243222234232).

The spelling of 11221211022021 in words is "eleven trillion, two hundred twenty-one billion, two hundred eleven million, twenty-two thousand, twenty-one".