1012135321 has 2 divisors, whose sum is σ = 1012135322. Its totient is φ = 1012135320.

The previous prime is 1012135279. The next prime is 1012135331. The reversal of 1012135321 is 1235312101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 991305225 + 20830096 = 31485^2 + 4564^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012135321 - 2⁷ = 1012135193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1012135331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506067660 + 506067661.

It is an arithmetic number, because the mean of its divisors is an integer number (506067661).

Almost surely, 2^1012135321 is an apocalyptic number.

It is an amenable number.

1012135321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012135321 is an equidigital number, since it uses as much as digits as its factorization.

1012135321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1012135321 is about 31814.0742596732. The cubic root of 1012135321 is about 1004.0288535408.

Adding to 1012135321 its reverse (1235312101), we get a palindrome (2247447422).

The spelling of 1012135321 in words is "one billion, twelve million, one hundred thirty-five thousand, three hundred twenty-one".