210101112101 has 4 divisors (see below), whose sum is σ = 211960414092. Its totient is φ = 208241810112.

The previous prime is 210101112041. The next prime is 210101112197. The reversal of 210101112101 is 101211101012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92143209601 + 117957902500 = 303551^2 + 343450^2 .

It is a cyclic number.

It is not a de Polignac number, because 210101112101 - 2¹⁸ = 210100849957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210101114101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 929650826 + ... + 929651051.

It is an arithmetic number, because the mean of its divisors is an integer number (52990103523).

Almost surely, 2^210101112101 is an apocalyptic number.

It is an amenable number.

210101112101 is a deficient number, since it is larger than the sum of its proper divisors (1859301991).

210101112101 is a wasteful number, since it uses less digits than its factorization.

210101112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859301990.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 210101112101 its reverse (101211101012), we get a palindrome (311312213113).

It can be divided in two parts, 2101011 and 12101, that added together give a palindrome (2113112).

The spelling of 210101112101 in words is "two hundred ten billion, one hundred one million, one hundred twelve thousand, one hundred one".