22212011211221 has 8 divisors (see below), whose sum is σ = 24140082757560. Its totient is φ = 20315290421952.

The previous prime is 22212011211167. The next prime is 22212011211301. The reversal of 22212011211221 is 12211211021222.

It can be written as a sum of positive squares in 4 ways, for example, as 3553828996 + 22208457382225 = 59614^2 + 4712585^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 22212011211221 - 2²⁶ = 22211944102357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22212011211193 and 22212011211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212011214221) 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, 7837687790 + ... + 7837690623.

It is an arithmetic number, because the mean of its divisors is an integer number (3017510344695).

Almost surely, 2^{22212011211221} is an apocalyptic number.

It is an amenable number.

22212011211221 is a deficient number, since it is larger than the sum of its proper divisors (1928071546339).

22212011211221 is a wasteful number, since it uses less digits than its factorization.

22212011211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15675378535.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22212011211221 its reverse (12211211021222), we get a palindrome (34423222232443).

The spelling of 22212011211221 in words is "twenty-two trillion, two hundred twelve billion, eleven million, two hundred eleven thousand, two hundred twenty-one".