211242412221 has 8 divisors (see below), whose sum is σ = 281665489440. Its totient is φ = 140823804912.

The previous prime is 211242412207. The next prime is 211242412229. The reversal of 211242412221 is 122214242112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211242412221 - 2⁷ = 211242412093 is a prime.

It is a super-3 number, since 3×211242412221³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211242412191 and 211242412200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211242412229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005606 + ... + 1197383.

It is an arithmetic number, because the mean of its divisors is an integer number (35208186180).

Almost surely, 2^211242412221 is an apocalyptic number.

It is an amenable number.

211242412221 is a deficient number, since it is larger than the sum of its proper divisors (70423077219).

211242412221 is a wasteful number, since it uses less digits than its factorization.

211242412221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234955.

The product of its digits is 1024, while the sum is 24.

Adding to 211242412221 its reverse (122214242112), we get a palindrome (333456654333).

The spelling of 211242412221 in words is "two hundred eleven billion, two hundred forty-two million, four hundred twelve thousand, two hundred twenty-one".