1161502221151 has 4 divisors (see below), whose sum is σ = 1192894173112. Its totient is φ = 1130110269192.

The previous prime is 1161502221109. The next prime is 1161502221157. The reversal of 1161502221151 is 1511222051611.

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 1161502221151 - 2⁷ = 1161502221023 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 (1161502221157) 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, 15695975925 + ... + 15695975998.

It is an arithmetic number, because the mean of its divisors is an integer number (298223543278).

Almost surely, 2^{1161502221151} is an apocalyptic number.

1161502221151 is a deficient number, since it is larger than the sum of its proper divisors (31391951961).

1161502221151 is an equidigital number, since it uses as much as digits as its factorization.

1161502221151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31391951960.

The product of its (nonzero) digits is 1200, while the sum is 28.

Adding to 1161502221151 its reverse (1511222051611), we get a palindrome (2672724272762).

The spelling of 1161502221151 in words is "one trillion, one hundred sixty-one billion, five hundred two million, two hundred twenty-one thousand, one hundred fifty-one".