2100001202001 has 48 divisors (see below), whose sum is σ = 3183334906752. Its totient is φ = 1331487590400.

The previous prime is 2100001201943. The next prime is 2100001202023. The reversal of 2100001202001 is 1002021000012.

It is not a de Polignac number, because 2100001202001 - 2⁷ = 2100001201873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (2100001202701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26966961 + ... + 27044721.

It is an arithmetic number, because the mean of its divisors is an integer number (66319477224).

Almost surely, 2^{2100001202001} is an apocalyptic number.

It is an amenable number.

2100001202001 is a deficient number, since it is larger than the sum of its proper divisors (1083333704751).

2100001202001 is a wasteful number, since it uses less digits than its factorization.

2100001202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78534 (or 78531 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2100001202001 its reverse (1002021000012), we get a palindrome (3102022202013).

The spelling of 2100001202001 in words is "two trillion, one hundred billion, one million, two hundred two thousand, one".