1211140151 has 4 divisors (see below), whose sum is σ = 1304304792. Its totient is φ = 1117975512.

The previous prime is 1211140111. The next prime is 1211140159. The reversal of 1211140151 is 1510411121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211140151 - 2¹⁸ = 1210878007 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 (1211140159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46582301 + ... + 46582326.

It is an arithmetic number, because the mean of its divisors is an integer number (326076198).

Almost surely, 2^1211140151 is an apocalyptic number.

1211140151 is a deficient number, since it is larger than the sum of its proper divisors (93164641).

1211140151 is an equidigital number, since it uses as much as digits as its factorization.

1211140151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93164640.

The product of its (nonzero) digits is 40, while the sum is 17.

The square root of 1211140151 is about 34801.4389214009. The cubic root of 1211140151 is about 1065.9368279653.

Adding to 1211140151 its reverse (1510411121), we get a palindrome (2721551272).

The spelling of 1211140151 in words is "one billion, two hundred eleven million, one hundred forty thousand, one hundred fifty-one".