33121001011 has 16 divisors (see below), whose sum is σ = 38027632320. Its totient is φ = 28258352640.

The previous prime is 33121000981. The next prime is 33121001021. The reversal of 33121001011 is 11010012133.

It is not a de Polignac number, because 33121001011 - 2²¹ = 33118903859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33121000982 and 33121001000.

It is not an unprimeable number, because it can be changed into a prime (33121001021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1952655 + ... + 1969543.

It is an arithmetic number, because the mean of its divisors is an integer number (2376727020).

Almost surely, 2^33121001011 is an apocalyptic number.

33121001011 is a deficient number, since it is larger than the sum of its proper divisors (4906631309).

33121001011 is a wasteful number, since it uses less digits than its factorization.

33121001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18174.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 33121001011 its reverse (11010012133), we get a palindrome (44131013144).

The spelling of 33121001011 in words is "thirty-three billion, one hundred twenty-one million, one thousand, eleven".