1151299021 has 2 divisors, whose sum is σ = 1151299022. Its totient is φ = 1151299020.

The previous prime is 1151298991. The next prime is 1151299073. The reversal of 1151299021 is 1209921511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 902101225 + 249197796 = 30035^2 + 15786^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151299021 - 2⁹ = 1151298509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151299321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575649510 + 575649511.

It is an arithmetic number, because the mean of its divisors is an integer number (575649511).

Almost surely, 2^1151299021 is an apocalyptic number.

It is an amenable number.

1151299021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151299021 is an equidigital number, since it uses as much as digits as its factorization.

1151299021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 31.

The square root of 1151299021 is about 33930.7975296780. The cubic root of 1151299021 is about 1048.0838890004.

The spelling of 1151299021 in words is "one billion, one hundred fifty-one million, two hundred ninety-nine thousand, twenty-one".