101210211121 has 4 divisors (see below), whose sum is σ = 101238797044. Its totient is φ = 101181625200.

The previous prime is 101210211119. The next prime is 101210211133. The reversal of 101210211121 is 121112012101.

It is a happy number.

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 73406316096 + 27803895025 = 270936^2 + 166745^2 .

It is a cyclic number.

It is not a de Polignac number, because 101210211121 - 2¹ = 101210211119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101210211191) 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, 14287650 + ... + 14294731.

It is an arithmetic number, because the mean of its divisors is an integer number (25309699261).

Almost surely, 2^101210211121 is an apocalyptic number.

It is an amenable number.

101210211121 is a deficient number, since it is larger than the sum of its proper divisors (28585923).

101210211121 is an equidigital number, since it uses as much as digits as its factorization.

101210211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28585922.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101210211121 its reverse (121112012101), we get a palindrome (222322223222).

The spelling of 101210211121 in words is "one hundred one billion, two hundred ten million, two hundred eleven thousand, one hundred twenty-one".