133221222121 has 8 divisors (see below), whose sum is σ = 145820960264. Its totient is φ = 120957477120.

The previous prime is 133221222107. The next prime is 133221222139. The reversal of 133221222121 is 121222122331.

It can be written as a sum of positive squares in 4 ways, for example, as 12298810000 + 120922412121 = 110900^2 + 347739^2 .

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 133221222121 - 2¹³ = 133221213929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133221222092 and 133221222101.

It is not an unprimeable number, because it can be changed into a prime (133221222191) 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, 83997456 + ... + 83999041.

It is an arithmetic number, because the mean of its divisors is an integer number (18227620033).

Almost surely, 2^133221222121 is an apocalyptic number.

It is an amenable number.

133221222121 is a deficient number, since it is larger than the sum of its proper divisors (12599738143).

133221222121 is a wasteful number, since it uses less digits than its factorization.

133221222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167996571.

The product of its digits is 576, while the sum is 22.

Adding to 133221222121 its reverse (121222122331), we get a palindrome (254443344452).

The spelling of 133221222121 in words is "one hundred thirty-three billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-one".