210123221022 has 96 divisors (see below), whose sum is σ = 535491736416. Its totient is φ = 58706208000.

The previous prime is 210123220999. The next prime is 210123221039. The reversal of 210123221022 is 220122321012.

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 = 210123220986 and 210123221004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2147772 + ... + 2243472.

It is an arithmetic number, because the mean of its divisors is an integer number (5578038921).

Almost surely, 2^210123221022 is an apocalyptic number.

210123221022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 210123221022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267745868208).

210123221022 is an abundant number, since it is smaller than the sum of its proper divisors (325368515394).

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

210123221022 is a wasteful number, since it uses less digits than its factorization.

210123221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96586 (or 96583 counting only the distinct ones).

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

Adding to 210123221022 its reverse (220122321012), we get a palindrome (430245542034).

The spelling of 210123221022 in words is "two hundred ten billion, one hundred twenty-three million, two hundred twenty-one thousand, twenty-two".