1031221213131 has 16 divisors (see below), whose sum is σ = 1376836764800. Its totient is φ = 686543879808.

The previous prime is 1031221213093. The next prime is 1031221213151. The reversal of 1031221213131 is 1313121221301.

It is not a de Polignac number, because 1031221213131 - 2¹⁸ = 1031220950987 is a prime.

It is a super-2 number, since 2×1031221213131² (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 = 1031221213098 and 1031221213107.

It is not an unprimeable number, because it can be changed into a prime (1031221213151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6438240 + ... + 6596466.

It is an arithmetic number, because the mean of its divisors is an integer number (86052297800).

Almost surely, 2^{1031221213131} is an apocalyptic number.

1031221213131 is a deficient number, since it is larger than the sum of its proper divisors (345615551669).

1031221213131 is a wasteful number, since it uses less digits than its factorization.

1031221213131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161178.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1031221213131 its reverse (1313121221301), we get a palindrome (2344342434432).

It can be divided in two parts, 103122 and 1213131, that added together give a triangular number (1316253 = T₁₆₂₂).

The spelling of 1031221213131 in words is "one trillion, thirty-one billion, two hundred twenty-one million, two hundred thirteen thousand, one hundred thirty-one".