1031102043021 has 12 divisors (see below), whose sum is σ = 1489484274460. Its totient is φ = 687348443520.

The previous prime is 1031102042987. The next prime is 1031102043043. The reversal of 1031102043021 is 1203402011301.

1031102043021 is a `hidden beast` number, since 103 + 110 + 2 + 0 + 430 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 589593622500 + 441508420521 = 767850^2 + 664461^2 .

It is not a de Polignac number, because 1031102043021 - 2²³ = 1031093654413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031102042985 and 1031102043003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031102043071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4286290 + ... + 4520451.

Almost surely, 2^{1031102043021} is an apocalyptic number.

It is an amenable number.

1031102043021 is a deficient number, since it is larger than the sum of its proper divisors (458382231439).

1031102043021 is a wasteful number, since it uses less digits than its factorization.

1031102043021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8819756 (or 8819753 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1031102043021 its reverse (1203402011301), we get a palindrome (2234504054322).

The spelling of 1031102043021 in words is "one trillion, thirty-one billion, one hundred two million, forty-three thousand, twenty-one".