20211310121310 has 384 divisors, whose sum is σ = 70244674053120. Its totient is φ = 4017152620800.

The previous prime is 20211310121237. The next prime is 20211310121351. The reversal of 20211310121310 is 1312101311202.

20211310121310 is a `hidden beast` number, since 2 + 0 + 21 + 1 + 310 + 1 + 21 + 310 = 666.

It is a super-2 number, since 2×20211310121310² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 10079040 + ... + 11916780.

It is an arithmetic number, because the mean of its divisors is an integer number (182928838680).

Almost surely, 2^{20211310121310} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20211310121310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35122337026560).

20211310121310 is an abundant number, since it is smaller than the sum of its proper divisors (50033363931810).

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

20211310121310 is a wasteful number, since it uses less digits than its factorization.

20211310121310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837821 (or 1837792 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 20211310121310 its reverse (1312101311202), we get a palindrome (21523411432512).

The spelling of 20211310121310 in words is "twenty trillion, two hundred eleven billion, three hundred ten million, one hundred twenty-one thousand, three hundred ten".