1131012011021 has 2 divisors, whose sum is σ = 1131012011022. Its totient is φ = 1131012011020.

The previous prime is 1131012011011. The next prime is 1131012011039. The reversal of 1131012011021 is 1201102101311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 586679402500 + 544332608521 = 765950^2 + 737789^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131012011021 - 2¹⁸ = 1131011748877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131012010987 and 1131012011005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131012011011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565506005510 + 565506005511.

It is an arithmetic number, because the mean of its divisors is an integer number (565506005511).

Almost surely, 2^{1131012011021} is an apocalyptic number.

It is an amenable number.

1131012011021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131012011021 is an equidigital number, since it uses as much as digits as its factorization.

1131012011021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1131012011021 its reverse (1201102101311), we get a palindrome (2332114112332).

The spelling of 1131012011021 in words is "one trillion, one hundred thirty-one billion, twelve million, eleven thousand, twenty-one".