1333729221 has 32 divisors (see below), whose sum is σ = 2073738240. Its totient is φ = 754300800.

The previous prime is 1333729211. The next prime is 1333729283. The reversal of 1333729221 is 1229273331.

It is not a de Polignac number, because 1333729221 - 2⁹ = 1333728709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1333729211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9690 + ... + 52548.

It is an arithmetic number, because the mean of its divisors is an integer number (64804320).

Almost surely, 2^1333729221 is an apocalyptic number.

1333729221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1333729221 is a deficient number, since it is larger than the sum of its proper divisors (740009019).

1333729221 is a wasteful number, since it uses less digits than its factorization.

1333729221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42937.

The product of its digits is 13608, while the sum is 33.

The square root of 1333729221 is about 36520.2576798138. The cubic root of 1333729221 is about 1100.7513382082.

The spelling of 1333729221 in words is "one billion, three hundred thirty-three million, seven hundred twenty-nine thousand, two hundred twenty-one".