1011310121 has 2 divisors, whose sum is σ = 1011310122. Its totient is φ = 1011310120.

The previous prime is 1011310109. The next prime is 1011310123. The reversal of 1011310121 is 1210131101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988222096 + 23088025 = 31436^2 + 4805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011310121 - 2⁶ = 1011310057 is a prime.

Together with 1011310123, 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 (1011310123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505655060 + 505655061.

It is an arithmetic number, because the mean of its divisors is an integer number (505655061).

Almost surely, 2^1011310121 is an apocalyptic number.

It is an amenable number.

1011310121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011310121 is an equidigital number, since it uses as much as digits as its factorization.

1011310121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1011310121 is about 31801.1025123344. The cubic root of 1011310121 is about 1003.7559157686.

Adding to 1011310121 its reverse (1210131101), we get a palindrome (2221441222).

The spelling of 1011310121 in words is "one billion, eleven million, three hundred ten thousand, one hundred twenty-one".