33266121901 has 4 divisors (see below), whose sum is σ = 33266494204. Its totient is φ = 33265749600.

The previous prime is 33266121853. The next prime is 33266121913. The reversal of 33266121901 is 10912166233.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 18260116900 + 15006005001 = 135130^2 + 122499^2 .

It is a 3-Lehmer number, since φ(33266121901) divides (33266121901-1)³.

It is a cyclic number.

It is not a de Polignac number, because 33266121901 - 2¹⁵ = 33266089133 is a prime.

It is a super-2 number, since 2×33266121901² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33266121991) 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, 37231 + ... + 260611.

It is an arithmetic number, because the mean of its divisors is an integer number (8316623551).

It is a Poulet number, since it divides 2^33266121900-1.

Almost surely, 2^33266121901 is an apocalyptic number.

33266121901 is the 148921-st pentagonal number.

It is an amenable number.

33266121901 is a deficient number, since it is larger than the sum of its proper divisors (372303).

33266121901 is a wasteful number, since it uses less digits than its factorization.

33266121901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372302.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 33266121901 in words is "thirty-three billion, two hundred sixty-six million, one hundred twenty-one thousand, nine hundred one".