33121201000 has 64 divisors (see below), whose sum is σ = 77537425680. Its totient is φ = 13242700800.

The previous prime is 33121200989. The next prime is 33121201007. The reversal of 33121201000 is 10212133.

It can be written as a sum of positive squares in 8 ways, for example, as 9036023364 + 24085177636 = 95058^2 + 155194^2 .

It is not an unprimeable number, because it can be changed into a prime (33121201007) 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, 2851204 + ... + 2862796.

Almost surely, 2^33121201000 is an apocalyptic number.

It is an amenable number.

33121201000 is an abundant number, since it is smaller than the sum of its proper divisors (44416224680).

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

33121201000 is a wasteful number, since it uses less digits than its factorization.

33121201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14471 (or 14457 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 33121201000 its reverse (10212133), we get a palindrome (33131413133).

The spelling of 33121201000 in words is "thirty-three billion, one hundred twenty-one million, two hundred one thousand".