1016245121 has 2 divisors, whose sum is σ = 1016245122. Its totient is φ = 1016245120.

The previous prime is 1016245117. The next prime is 1016245123. The reversal of 1016245121 is 1215426101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 572932096 + 443313025 = 23936^2 + 21055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1016245121 - 2² = 1016245117 is a prime.

Together with 1016245123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1016245123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508122560 + 508122561.

It is an arithmetic number, because the mean of its divisors is an integer number (508122561).

Almost surely, 2^1016245121 is an apocalyptic number.

It is an amenable number.

1016245121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1016245121 is an equidigital number, since it uses as much as digits as its factorization.

1016245121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1016245121 is about 31878.5997339908. The cubic root of 1016245121 is about 1005.3859794782.

The spelling of 1016245121 in words is "one billion, sixteen million, two hundred forty-five thousand, one hundred twenty-one".