220221012210021 has 12 divisors (see below), whose sum is σ = 331927322751648. Its totient is φ = 140430790394664.

The previous prime is 220221012209977. The next prime is 220221012210071. The reversal of 220221012210021 is 120012210122022.

It is a happy number.

220221012210021 is a `hidden beast` number, since 220 + 2 + 210 + 1 + 2 + 210 + 0 + 21 = 666.

It is not a de Polignac number, because 220221012210021 - 2⁷ = 220221012209893 is a prime.

It is a super-2 number, since 2×220221012210021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220221012209976 and 220221012210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221012210071) 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, 531934811895 + ... + 531934812308.

It is an arithmetic number, because the mean of its divisors is an integer number (27660610229304).

Almost surely, 2^{220221012210021} is an apocalyptic number.

It is an amenable number.

220221012210021 is a deficient number, since it is larger than the sum of its proper divisors (111706310541627).

220221012210021 is a wasteful number, since it uses less digits than its factorization.

220221012210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063869624232 (or 1063869624229 counting only the distinct ones).

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

Adding to 220221012210021 its reverse (120012210122022), we get a palindrome (340233222332043).

The spelling of 220221012210021 in words is "two hundred twenty trillion, two hundred twenty-one billion, twelve million, two hundred ten thousand, twenty-one".