212001012101 has 4 divisors (see below), whose sum is σ = 212005691052. Its totient is φ = 211996333152.

The previous prime is 212001012079. The next prime is 212001012109. The reversal of 212001012101 is 101210100212.

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 42772444225 + 169228567876 = 206815^2 + 411374^2 .

It is a cyclic number.

It is not a de Polignac number, because 212001012101 - 2³⁴ = 194821142917 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 (212001012109) 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, 2270840 + ... + 2362353.

It is an arithmetic number, because the mean of its divisors is an integer number (53001422763).

Almost surely, 2^212001012101 is an apocalyptic number.

It is an amenable number.

212001012101 is a deficient number, since it is larger than the sum of its proper divisors (4678951).

212001012101 is an equidigital number, since it uses as much as digits as its factorization.

212001012101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4678950.

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

Adding to 212001012101 its reverse (101210100212), we get a palindrome (313211112313).

It can be divided in two parts, 21200 and 1012101, that added together give a palindrome (1033301).

The spelling of 212001012101 in words is "two hundred twelve billion, one million, twelve thousand, one hundred one".