210101200020101 has 8 divisors (see below), whose sum is σ = 226264917739224. Its totient is φ = 193937780436480.

The previous prime is 210101200020097. The next prime is 210101200020137. The reversal of 210101200020101 is 101020002101012.

It can be written as a sum of positive squares in 4 ways, for example, as 122809083869476 + 87292116150625 = 11081926^2 + 9343025^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210101200020101 - 2² = 210101200020097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210101200020601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73069160 + ... + 75890081.

It is an arithmetic number, because the mean of its divisors is an integer number (28283114717403).

Almost surely, 2^{210101200020101} is an apocalyptic number.

It is an amenable number.

210101200020101 is a deficient number, since it is larger than the sum of its proper divisors (16163717719123).

210101200020101 is a wasteful number, since it uses less digits than its factorization.

210101200020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149067751.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210101200020101 its reverse (101020002101012), we get a palindrome (311121202121113).

The spelling of 210101200020101 in words is "two hundred ten trillion, one hundred one billion, two hundred million, twenty thousand, one hundred one".