33221321012 has 18 divisors (see below), whose sum is σ = 63902996514. Its totient is φ = 15100600240.

The previous prime is 33221320931. The next prime is 33221321173. The reversal of 33221321012 is 21012312233.

It can be written as a sum of positive squares in only one way, i.e., 25251116836 + 7970204176 = 158906^2 + 89276^2 .

It is a super-2 number, since 2×33221321012² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34319063 + ... + 34320030.

It is an arithmetic number, because the mean of its divisors is an integer number (3550166473).

Almost surely, 2^33221321012 is an apocalyptic number.

It is an amenable number.

33221321012 is a deficient number, since it is larger than the sum of its proper divisors (30681675502).

33221321012 is a wasteful number, since it uses less digits than its factorization.

33221321012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68639119 (or 68639106 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 33221321012 its reverse (21012312233), we get a palindrome (54233633245).

The spelling of 33221321012 in words is "thirty-three billion, two hundred twenty-one million, three hundred twenty-one thousand, twelve".