1011025133 has 4 divisors (see below), whose sum is σ = 1011109440. Its totient is φ = 1010940828.

The previous prime is 1011025129. The next prime is 1011025157. The reversal of 1011025133 is 3315201101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1011025133 - 2² = 1011025129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011025193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20435 + ... + 49392.

It is an arithmetic number, because the mean of its divisors is an integer number (252777360).

Almost surely, 2^1011025133 is an apocalyptic number.

It is an amenable number.

1011025133 is a deficient number, since it is larger than the sum of its proper divisors (84307).

1011025133 is an equidigital number, since it uses as much as digits as its factorization.

1011025133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84306.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1011025133 is about 31796.6214085711. The cubic root of 1011025133 is about 1003.6616205043.

Adding to 1011025133 its reverse (3315201101), we get a palindrome (4326226234).

The spelling of 1011025133 in words is "one billion, eleven million, twenty-five thousand, one hundred thirty-three".