33122212121 has 8 divisors (see below), whose sum is σ = 33360163464. Its totient is φ = 32885112960.

The previous prime is 33122212091. The next prime is 33122212127. The reversal of 33122212121 is 12121222133.

It can be written as a sum of positive squares in 4 ways, for example, as 373880896 + 32748331225 = 19336^2 + 180965^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33122212121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33122212093 and 33122212102.

It is not an unprimeable number, because it can be changed into a prime (33122212127) 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, 134930 + ... + 290603.

It is an arithmetic number, because the mean of its divisors is an integer number (4170020433).

Almost surely, 2^33122212121 is an apocalyptic number.

It is an amenable number.

33122212121 is a deficient number, since it is larger than the sum of its proper divisors (237951343).

33122212121 is a wasteful number, since it uses less digits than its factorization.

33122212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426091.

The product of its digits is 288, while the sum is 20.

Adding to 33122212121 its reverse (12121222133), we get a palindrome (45243434254).

It can be divided in two parts, 331222 and 12121, that added together give a palindrome (343343).

The spelling of 33122212121 in words is "thirty-three billion, one hundred twenty-two million, two hundred twelve thousand, one hundred twenty-one".