32001220001 has 4 divisors (see below), whose sum is σ = 32781737604. Its totient is φ = 31220702400.

The previous prime is 32001219997. The next prime is 32001220157. The reversal of 32001220001 is 10002210023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10002210023 = 13 ⋅769400771.

It can be written as a sum of positive squares in 2 ways, for example, as 14562696976 + 17438523025 = 120676^2 + 132055^2 .

It is a cyclic number.

It is not a de Polignac number, because 32001220001 - 2² = 32001219997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32001220201) 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, 390258740 + ... + 390258821.

It is an arithmetic number, because the mean of its divisors is an integer number (8195434401).

Almost surely, 2^32001220001 is an apocalyptic number.

It is an amenable number.

32001220001 is a deficient number, since it is larger than the sum of its proper divisors (780517603).

32001220001 is an equidigital number, since it uses as much as digits as its factorization.

32001220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780517602.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 32001220001 its reverse (10002210023), we get a palindrome (42003430024).

The spelling of 32001220001 in words is "thirty-two billion, one million, two hundred twenty thousand, one".