20101032321 has 64 divisors (see below), whose sum is σ = 29110910976. Its totient is φ = 12305779200.

The previous prime is 20101032319. The next prime is 20101032323. The reversal of 20101032321 is 12323010102.

It is an interprime number because it is at equal distance from previous prime (20101032319) and next prime (20101032323).

It is not a de Polignac number, because 20101032321 - 2¹ = 20101032319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20101032321.

It is not an unprimeable number, because it can be changed into a prime (20101032323) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74173416 + ... + 74173686.

It is an arithmetic number, because the mean of its divisors is an integer number (454857984).

Almost surely, 2^20101032321 is an apocalyptic number.

It is an amenable number.

20101032321 is a deficient number, since it is larger than the sum of its proper divisors (9009878655).

20101032321 is a wasteful number, since it uses less digits than its factorization.

20101032321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20101032321 its reverse (12323010102), we get a palindrome (32424042423).

The spelling of 20101032321 in words is "twenty billion, one hundred one million, thirty-two thousand, three hundred twenty-one".