1151100650261 has 4 divisors (see below), whose sum is σ = 1162967667372. Its totient is φ = 1139233633152.

The previous prime is 1151100650237. The next prime is 1151100650291. The reversal of 1151100650261 is 1620560011511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 876833723236 + 274266927025 = 936394^2 + 523705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151100650261 - 2³⁸ = 876222743317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151100650291) 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, 5933508410 + ... + 5933508603.

It is an arithmetic number, because the mean of its divisors is an integer number (290741916843).

Almost surely, 2^{1151100650261} is an apocalyptic number.

It is an amenable number.

1151100650261 is a deficient number, since it is larger than the sum of its proper divisors (11867017111).

1151100650261 is an equidigital number, since it uses as much as digits as its factorization.

1151100650261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11867017110.

The product of its (nonzero) digits is 1800, while the sum is 29.

Adding to 1151100650261 its reverse (1620560011511), we get a palindrome (2771660661772).

The spelling of 1151100650261 in words is "one trillion, one hundred fifty-one billion, one hundred million, six hundred fifty thousand, two hundred sixty-one".