1210891151 has 2 divisors, whose sum is σ = 1210891152. Its totient is φ = 1210891150.

The previous prime is 1210891141. The next prime is 1210891219. The reversal of 1210891151 is 1511980121.

It is a weak prime.

It is an emirp because it is prime and its reverse (1511980121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210891151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210891111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605445575 + 605445576.

It is an arithmetic number, because the mean of its divisors is an integer number (605445576).

Almost surely, 2^1210891151 is an apocalyptic number.

1210891151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210891151 is an equidigital number, since it uses as much as digits as its factorization.

1210891151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 29.

The square root of 1210891151 is about 34797.8612992235. The cubic root of 1210891151 is about 1065.8637738101.

The spelling of 1210891151 in words is "one billion, two hundred ten million, eight hundred ninety-one thousand, one hundred fifty-one".