132237156721 has 4 divisors (see below), whose sum is σ = 132334319844. Its totient is φ = 132139993600.

The previous prime is 132237156703. The next prime is 132237156739. The reversal of 132237156721 is 127651732231.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (132237156703) and next prime (132237156739).

It can be written as a sum of positive squares in 2 ways, for example, as 91588548496 + 40648608225 = 302636^2 + 201615^2 .

It is a cyclic number.

It is not a de Polignac number, because 132237156721 - 2²¹ = 132235059569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (132237151721) 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, 48579520 + ... + 48582241.

It is an arithmetic number, because the mean of its divisors is an integer number (33083579961).

Almost surely, 2^132237156721 is an apocalyptic number.

It is an amenable number.

132237156721 is a deficient number, since it is larger than the sum of its proper divisors (97163123).

132237156721 is an equidigital number, since it uses as much as digits as its factorization.

132237156721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97163122.

The product of its digits is 105840, while the sum is 40.

Adding to 132237156721 its reverse (127651732231), we get a palindrome (259888888952).

The spelling of 132237156721 in words is "one hundred thirty-two billion, two hundred thirty-seven million, one hundred fifty-six thousand, seven hundred twenty-one".