1011002261 has 2 divisors, whose sum is σ = 1011002262. Its totient is φ = 1011002260.

The previous prime is 1011002243. The next prime is 1011002281. The reversal of 1011002261 is 1622001101.

1011002261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1010604100 + 398161 = 31790^2 + 631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011002261 is a prime.

It is a super-2 number, since 2×1011002261² = 2044251143494224242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011002281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505501130 + 505501131.

It is an arithmetic number, because the mean of its divisors is an integer number (505501131).

Almost surely, 2^1011002261 is an apocalyptic number.

It is an amenable number.

1011002261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011002261 is an equidigital number, since it uses as much as digits as its factorization.

1011002261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1011002261 is about 31796.2617456832. The cubic root of 1011002261 is about 1003.6540519744.

Adding to 1011002261 its reverse (1622001101), we get a palindrome (2633003362).

The spelling of 1011002261 in words is "one billion, eleven million, two thousand, two hundred sixty-one".