212120221201 has 4 divisors (see below), whose sum is σ = 242423109952. Its totient is φ = 181817332452.

The previous prime is 212120221147. The next prime is 212120221303. The reversal of 212120221201 is 102122021212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 212120221201 - 2¹³ = 212120213009 is a prime.

It is a super-2 number, since 2×212120221201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212120221601) 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, 15151444365 + ... + 15151444378.

It is an arithmetic number, because the mean of its divisors is an integer number (60605777488).

Almost surely, 2^212120221201 is an apocalyptic number.

It is an amenable number.

212120221201 is a deficient number, since it is larger than the sum of its proper divisors (30302888751).

212120221201 is an equidigital number, since it uses as much as digits as its factorization.

212120221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30302888750.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212120221201 its reverse (102122021212), we get a palindrome (314242242413).

The spelling of 212120221201 in words is "two hundred twelve billion, one hundred twenty million, two hundred twenty-one thousand, two hundred one".