2102001221001 has 32 divisors (see below), whose sum is σ = 3109868236800. Its totient is φ = 1252110041280.

The previous prime is 2102001220993. The next prime is 2102001221003. The reversal of 2102001221001 is 1001221002012.

It is not a de Polignac number, because 2102001221001 - 2³ = 2102001220993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2102001221003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10427595 + ... + 10627263.

It is an arithmetic number, because the mean of its divisors is an integer number (97183382400).

Almost surely, 2^{2102001221001} is an apocalyptic number.

It is an amenable number.

2102001221001 is a deficient number, since it is larger than the sum of its proper divisors (1007867015799).

2102001221001 is a wasteful number, since it uses less digits than its factorization.

2102001221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205149.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2102001221001 its reverse (1001221002012), we get a palindrome (3103222223013).

The spelling of 2102001221001 in words is "two trillion, one hundred two billion, one million, two hundred twenty-one thousand, one".