1012321139 has 2 divisors, whose sum is σ = 1012321140. Its totient is φ = 1012321138.

The previous prime is 1012321133. The next prime is 1012321171. The reversal of 1012321139 is 9311232101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1012321139 - 2¹² = 1012317043 is a prime.

It is not a weakly prime, because it can be changed into another prime (1012321133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506160569 + 506160570.

It is an arithmetic number, because the mean of its divisors is an integer number (506160570).

Almost surely, 2^1012321139 is an apocalyptic number.

1012321139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012321139 is an equidigital number, since it uses as much as digits as its factorization.

1012321139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1012321139 is about 31816.9944997952. The cubic root of 1012321139 is about 1004.0902930254.

The spelling of 1012321139 in words is "one billion, twelve million, three hundred twenty-one thousand, one hundred thirty-nine".