1210210110101 has 4 divisors (see below), whose sum is σ = 1211590054092. Its totient is φ = 1208830166112.

The previous prime is 1210210110097. The next prime is 1210210110133. The reversal of 1210210110101 is 1010110120121.

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 1075366926001 + 134843184100 = 1036999^2 + 367210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210210110101 - 2² = 1210210110097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210210110001) 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, 689970680 + ... + 689972433.

It is an arithmetic number, because the mean of its divisors is an integer number (302897513523).

Almost surely, 2^{1210210110101} is an apocalyptic number.

It is an amenable number.

1210210110101 is a deficient number, since it is larger than the sum of its proper divisors (1379943991).

1210210110101 is an equidigital number, since it uses as much as digits as its factorization.

1210210110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379943990.

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

Adding to 1210210110101 its reverse (1010110120121), we get a palindrome (2220320230222).

The spelling of 1210210110101 in words is "one trillion, two hundred ten billion, two hundred ten million, one hundred ten thousand, one hundred one".