210123011321020 has 48 divisors (see below), whose sum is σ = 504305382712320. Its totient is φ = 72040724518464.

The previous prime is 210123011320921. The next prime is 210123011321099. The reversal of 210123011321020 is 20123110321012.

It is a super-2 number, since 2×210123011321020² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8124084 + ... + 22051003.

It is an arithmetic number, because the mean of its divisors is an integer number (10506362139840).

Almost surely, 2^{210123011321020} is an apocalyptic number.

210123011321020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210123011321020 is an abundant number, since it is smaller than the sum of its proper divisors (294182371391300).

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

210123011321020 is a wasteful number, since it uses less digits than its factorization.

210123011321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30224842 (or 30224840 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 210123011321020 its reverse (20123110321012), we get a palindrome (230246121642032).

The spelling of 210123011321020 in words is "two hundred ten trillion, one hundred twenty-three billion, eleven million, three hundred twenty-one thousand, twenty".