32001400721 has 2 divisors, whose sum is σ = 32001400722. Its totient is φ = 32001400720.

The previous prime is 32001400709. The next prime is 32001400759. The reversal of 32001400721 is 12700410023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26809477696 + 5191923025 = 163736^2 + 72055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32001400721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 32001400693 and 32001400702.

It is not a weakly prime, because it can be changed into another prime (32001400121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16000700360 + 16000700361.

It is an arithmetic number, because the mean of its divisors is an integer number (16000700361).

Almost surely, 2^32001400721 is an apocalyptic number.

It is an amenable number.

32001400721 is a deficient number, since it is larger than the sum of its proper divisors (1).

32001400721 is an equidigital number, since it uses as much as digits as its factorization.

32001400721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

Adding to 32001400721 its reverse (12700410023), we get a palindrome (44701810744).

The spelling of 32001400721 in words is "thirty-two billion, one million, four hundred thousand, seven hundred twenty-one".