1102020131021 has 12 divisors (see below), whose sum is σ = 1129708954836. Its totient is φ = 1074994337280.

The previous prime is 1102020130879. The next prime is 1102020131041. The reversal of 1102020131021 is 1201310202011.

It can be written as a sum of positive squares in 6 ways, for example, as 143160073225 + 958860057796 = 378365^2 + 979214^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1102020131021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1102020130987 and 1102020131005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102020131041) 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, 13435691 + ... + 13517463.

It is an arithmetic number, because the mean of its divisors is an integer number (94142412903).

Almost surely, 2^{1102020131021} is an apocalyptic number.

It is an amenable number.

1102020131021 is a deficient number, since it is larger than the sum of its proper divisors (27688823815).

1102020131021 is an frugal number, since it uses more digits than its factorization.

1102020131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89872 (or 89831 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1102020131021 its reverse (1201310202011), we get a palindrome (2303330333032).

The spelling of 1102020131021 in words is "one trillion, one hundred two billion, twenty million, one hundred thirty-one thousand, twenty-one".