212220003210021 has 96 divisors (see below), whose sum is σ = 334555028520960. Its totient is φ = 129170844125568.

The previous prime is 212220003210011. The next prime is 212220003210031. The reversal of 212220003210021 is 120012300022212.

212220003210021 is a `hidden beast` number, since 2 + 122 + 200 + 0 + 321 + 0 + 0 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (212220003210011) and next prime (212220003210031).

It is not a de Polignac number, because 212220003210021 - 2¹⁷ = 212220003078949 is a prime.

It is a super-2 number, since 2×212220003210021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212220003209976 and 212220003210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212220003210011) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 487524550 + ... + 487959656.

It is an arithmetic number, because the mean of its divisors is an integer number (3484948213760).

Almost surely, 2^{212220003210021} is an apocalyptic number.

It is an amenable number.

212220003210021 is a deficient number, since it is larger than the sum of its proper divisors (122335025310939).

212220003210021 is a wasteful number, since it uses less digits than its factorization.

212220003210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435903 (or 435900 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212220003210021 its reverse (120012300022212), we get a palindrome (332232303232233).

The spelling of 212220003210021 in words is "two hundred twelve trillion, two hundred twenty billion, three million, two hundred ten thousand, twenty-one".