210221032122 has 24 divisors (see below), whose sum is σ = 482271780276. Its totient is φ = 65951696256.

The previous prime is 210221032067. The next prime is 210221032163. The reversal of 210221032122 is 221230122012.

It can be written as a sum of positive squares in 2 ways, for example, as 201548021481 + 8673010641 = 448941^2 + 93129^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 210221032095 and 210221032104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 343498113 + ... + 343498724.

Almost surely, 2^210221032122 is an apocalyptic number.

210221032122 is an abundant number, since it is smaller than the sum of its proper divisors (272050748154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210221032122 is a wasteful number, since it uses less digits than its factorization.

210221032122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686996862 (or 686996859 counting only the distinct ones).

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

Adding to 210221032122 its reverse (221230122012), we get a palindrome (431451154134).

The spelling of 210221032122 in words is "two hundred ten billion, two hundred twenty-one million, thirty-two thousand, one hundred twenty-two".