2100021010001 has 32 divisors (see below), whose sum is σ = 2273408163840. Its totient is φ = 1933413318144.

The previous prime is 2100021009971. The next prime is 2100021010057. The reversal of 2100021010001 is 1000101200012.

It is a cyclic number.

It is not a de Polignac number, because 2100021010001 - 2¹⁰ = 2100021008977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2100021010201) 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, 133521800 + ... + 133537526.

It is an arithmetic number, because the mean of its divisors is an integer number (71044005120).

Almost surely, 2^{2100021010001} is an apocalyptic number.

It is an amenable number.

2100021010001 is a deficient number, since it is larger than the sum of its proper divisors (173387153839).

2100021010001 is a wasteful number, since it uses less digits than its factorization.

2100021010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16605.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 2100021010001 its reverse (1000101200012), we get a palindrome (3100122210013).

The spelling of 2100021010001 in words is "two trillion, one hundred billion, twenty-one million, ten thousand, one".