1021323213131 has 32 divisors (see below), whose sum is σ = 1153041942528. Its totient is φ = 898191141120.

The previous prime is 1021323213109. The next prime is 1021323213143. The reversal of 1021323213131 is 1313123231201.

It is not a de Polignac number, because 1021323213131 - 2³⁴ = 1004143343947 is a prime.

It is a super-2 number, since 2×1021323213131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021323213097 and 1021323213106.

It is not an unprimeable number, because it can be changed into a prime (1021323213151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16060460 + ... + 16123926.

It is an arithmetic number, because the mean of its divisors is an integer number (36032560704).

Almost surely, 2^{1021323213131} is an apocalyptic number.

1021323213131 is a deficient number, since it is larger than the sum of its proper divisors (131718729397).

1021323213131 is a wasteful number, since it uses less digits than its factorization.

1021323213131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64131.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1021323213131 its reverse (1313123231201), we get a palindrome (2334446444332).

The spelling of 1021323213131 in words is "one trillion, twenty-one billion, three hundred twenty-three million, two hundred thirteen thousand, one hundred thirty-one".