2123021321010 has 48 divisors (see below), whose sum is σ = 5519944713816. Its totient is φ = 566129862144.

The previous prime is 2123021321009. The next prime is 2123021321017. The reversal of 2123021321010 is 101231203212.

2123021321010 is a `hidden beast` number, since 2 + 1 + 230 + 213 + 210 + 10 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2041780930281 + 81240390729 = 1428909^2 + 285027^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2123021321017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6833572 + ... + 7137488.

Almost surely, 2^{2123021321010} is an apocalyptic number.

2123021321010 is an abundant number, since it is smaller than the sum of its proper divisors (3396923392806).

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

2123021321010 is a wasteful number, since it uses less digits than its factorization.

2123021321010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381547 (or 381544 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 2123021321010 its reverse (101231203212), we get a palindrome (2224252524222).

The spelling of 2123021321010 in words is "two trillion, one hundred twenty-three billion, twenty-one million, three hundred twenty-one thousand, ten".