210112221020 has 72 divisors (see below), whose sum is σ = 482519086560. Its totient is φ = 76811654400.

The previous prime is 210112221017. The next prime is 210112221023. The reversal of 210112221020 is 20122211012.

It is an interprime number because it is at equal distance from previous prime (210112221017) and next prime (210112221023).

It is a junction number, because it is equal to n+sod(n) for n = 210112220986 and 210112221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210112221023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33641 + ... + 649119.

It is an arithmetic number, because the mean of its divisors is an integer number (6701653980).

Almost surely, 2^210112221020 is an apocalyptic number.

210112221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210112221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241259543280).

210112221020 is an abundant number, since it is smaller than the sum of its proper divisors (272406865540).

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

210112221020 is a wasteful number, since it uses less digits than its factorization.

210112221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615615 (or 615600 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210112221020 its reverse (20122211012), we get a palindrome (230234432032).

The spelling of 210112221020 in words is "two hundred ten billion, one hundred twelve million, two hundred twenty-one thousand, twenty".