2001032123321 has 16 divisors (see below), whose sum is σ = 2495103636480. Its totient is φ = 1559051848080.

The previous prime is 2001032123317. The next prime is 2001032123369. The reversal of 2001032123321 is 1233212301002.

It is a cyclic number.

It is not a de Polignac number, because 2001032123321 - 2² = 2001032123317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001032123293 and 2001032123302.

It is not an unprimeable number, because it can be changed into a prime (2001032123621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 991781 + ... + 2232866.

It is an arithmetic number, because the mean of its divisors is an integer number (155943977280).

Almost surely, 2^{2001032123321} is an apocalyptic number.

It is an amenable number.

2001032123321 is a deficient number, since it is larger than the sum of its proper divisors (494071513159).

2001032123321 is a wasteful number, since it uses less digits than its factorization.

2001032123321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232724.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 2001032123321 its reverse (1233212301002), we get a palindrome (3234244424323).

The spelling of 2001032123321 in words is "two trillion, one billion, thirty-two million, one hundred twenty-three thousand, three hundred twenty-one".