20020121310 has 128 divisors (see below), whose sum is σ = 56760652800. Its totient is φ = 4424555520.

The previous prime is 20020121221. The next prime is 20020121321. The reversal of 20020121310 is 1312102002.

It is a super-2 number, since 2×20020121310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 742546 + ... + 769034.

It is an arithmetic number, because the mean of its divisors is an integer number (443442600).

Almost surely, 2^20020121310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20020121310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28380326400).

20020121310 is an abundant number, since it is smaller than the sum of its proper divisors (36740531490).

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

20020121310 is a wasteful number, since it uses less digits than its factorization.

20020121310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26626.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20020121310 its reverse (1312102002), we get a palindrome (21332223312).

The spelling of 20020121310 in words is "twenty billion, twenty million, one hundred twenty-one thousand, three hundred ten".