33121213011 has 8 divisors (see below), whose sum is σ = 49068463760. Its totient is φ = 22080808656.

The previous prime is 33121212977. The next prime is 33121213051. The reversal of 33121213011 is 11031212133.

It is not a de Polignac number, because 33121213011 - 2¹⁵ = 33121180243 is a prime.

It is a super-2 number, since 2×33121213011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33121213051) 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, 613355770 + ... + 613355823.

It is an arithmetic number, because the mean of its divisors is an integer number (6133557970).

Almost surely, 2^33121213011 is an apocalyptic number.

33121213011 is a deficient number, since it is larger than the sum of its proper divisors (15947250749).

33121213011 is a wasteful number, since it uses less digits than its factorization.

33121213011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226711602 (or 1226711596 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 33121213011 its reverse (11031212133), we get a palindrome (44152425144).

The spelling of 33121213011 in words is "thirty-three billion, one hundred twenty-one million, two hundred thirteen thousand, eleven".