2121211010201 has 4 divisors (see below), whose sum is σ = 2121557562804. Its totient is φ = 2120864457600.

The previous prime is 2121211010179. The next prime is 2121211010209. The reversal of 2121211010201 is 1020101121212.

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 117528294976 + 2003682715225 = 342824^2 + 1415515^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121211010201 - 2²⁶ = 2121143901337 is a prime.

It is a super-3 number, since 3×2121211010201³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121211010209) 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, 173267120 + ... + 173279361.

It is an arithmetic number, because the mean of its divisors is an integer number (530389390701).

Almost surely, 2^{2121211010201} is an apocalyptic number.

It is an amenable number.

2121211010201 is a deficient number, since it is larger than the sum of its proper divisors (346552603).

2121211010201 is an equidigital number, since it uses as much as digits as its factorization.

2121211010201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346552602.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2121211010201 its reverse (1020101121212), we get a palindrome (3141312131413).

The spelling of 2121211010201 in words is "two trillion, one hundred twenty-one billion, two hundred eleven million, ten thousand, two hundred one".