210222012120021 has 12 divisors (see below), whose sum is σ = 331258928189280. Its totient is φ = 127407280072680.

The previous prime is 210222012119993. The next prime is 210222012120041. The reversal of 210222012120021 is 120021210222012.

It is a happy number.

210222012120021 is a `hidden beast` number, since 2 + 102 + 220 + 121 + 200 + 21 = 666.

It is not a de Polignac number, because 210222012120021 - 2³⁹ = 209672256306133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210222012119976 and 210222012120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210222012120041) 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, 1061727333841 + ... + 1061727334038.

It is an arithmetic number, because the mean of its divisors is an integer number (27604910682440).

Almost surely, 2^{210222012120021} is an apocalyptic number.

It is an amenable number.

210222012120021 is a deficient number, since it is larger than the sum of its proper divisors (121036916069259).

210222012120021 is a wasteful number, since it uses less digits than its factorization.

210222012120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123454667896 (or 2123454667893 counting only the distinct ones).

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

Adding to 210222012120021 its reverse (120021210222012), we get a palindrome (330243222342033).

It can be divided in two parts, 2102220 and 12120021, that added together give a palindrome (14222241).

The spelling of 210222012120021 in words is "two hundred ten trillion, two hundred twenty-two billion, twelve million, one hundred twenty thousand, twenty-one".