1031242321221 has 64 divisors (see below), whose sum is σ = 1686386718720. Its totient is φ = 547149680640.

The previous prime is 1031242321129. The next prime is 1031242321223. The reversal of 1031242321221 is 1221232421301.

It is not a de Polignac number, because 1031242321221 - 2¹⁴ = 1031242304837 is a prime.

It is a super-2 number, since 2×1031242321221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1031242321191 and 1031242321200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031242321223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9149950 + ... + 9261968.

It is an arithmetic number, because the mean of its divisors is an integer number (26349792480).

Almost surely, 2^{1031242321221} is an apocalyptic number.

It is an amenable number.

1031242321221 is a deficient number, since it is larger than the sum of its proper divisors (655144397499).

1031242321221 is a wasteful number, since it uses less digits than its factorization.

1031242321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112394.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1031242321221 its reverse (1221232421301), we get a palindrome (2252474742522).

The spelling of 1031242321221 in words is "one trillion, thirty-one billion, two hundred forty-two million, three hundred twenty-one thousand, two hundred twenty-one".