2101100023501 has 2 divisors, whose sum is σ = 2101100023502. Its totient is φ = 2101100023500.

The previous prime is 2101100023489. The next prime is 2101100023553. The reversal of 2101100023501 is 1053200011012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1990001134276 + 111098889225 = 1410674^2 + 333315^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101100023501 - 2²¹ = 2101097926349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101100023591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050550011750 + 1050550011751.

It is an arithmetic number, because the mean of its divisors is an integer number (1050550011751).

Almost surely, 2^{2101100023501} is an apocalyptic number.

It is an amenable number.

2101100023501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101100023501 is an equidigital number, since it uses as much as digits as its factorization.

2101100023501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 2101100023501 its reverse (1053200011012), we get a palindrome (3154300034513).

The spelling of 2101100023501 in words is "two trillion, one hundred one billion, one hundred million, twenty-three thousand, five hundred one".