10002001221023 has 4 divisors (see below), whose sum is σ = 11430858538320. Its totient is φ = 8573143903728.

The previous prime is 10002001220941. The next prime is 10002001221031. The reversal of 10002001221023 is 32012210020001.

It is a happy number.

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 10002001221023 - 2¹⁰ = 10002001219999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10002001220989 and 10002001221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002001221053) 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, 714428658638 + ... + 714428658651.

It is an arithmetic number, because the mean of its divisors is an integer number (2857714634580).

Almost surely, 2^{10002001221023} is an apocalyptic number.

10002001221023 is a deficient number, since it is larger than the sum of its proper divisors (1428857317297).

10002001221023 is an equidigital number, since it uses as much as digits as its factorization.

10002001221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428857317296.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 10002001221023 its reverse (32012210020001), we get a palindrome (42014211241024).

The spelling of 10002001221023 in words is "ten trillion, two billion, one million, two hundred twenty-one thousand, twenty-three".