33113121320 has 16 divisors (see below), whose sum is σ = 74504523060. Its totient is φ = 13245248512.

The previous prime is 33113121277. The next prime is 33113121341. The reversal of 33113121320 is 2312131133.

It can be written as a sum of positive squares in 2 ways, for example, as 29806641316 + 3306480004 = 172646^2 + 57502^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 33113121292 and 33113121301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413913977 + ... + 413914056.

Almost surely, 2^33113121320 is an apocalyptic number.

It is an amenable number.

33113121320 is an abundant number, since it is smaller than the sum of its proper divisors (41391401740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33113121320 is a wasteful number, since it uses less digits than its factorization.

33113121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827828044 (or 827828040 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 33113121320 its reverse (2312131133), we get a palindrome (35425252453).

The spelling of 33113121320 in words is "thirty-three billion, one hundred thirteen million, one hundred twenty-one thousand, three hundred twenty".