133121203221 has 32 divisors (see below), whose sum is σ = 190578123648. Its totient is φ = 82360811520.

The previous prime is 133121203219. The next prime is 133121203247. The reversal of 133121203221 is 122302121331.

It is not a de Polignac number, because 133121203221 - 2¹ = 133121203219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133121203211) 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, 985461 + ... + 1112373.

It is an arithmetic number, because the mean of its divisors is an integer number (5955566364).

Almost surely, 2^133121203221 is an apocalyptic number.

It is an amenable number.

133121203221 is a deficient number, since it is larger than the sum of its proper divisors (57456920427).

133121203221 is a wasteful number, since it uses less digits than its factorization.

133121203221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127221.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 133121203221 its reverse (122302121331), we get a palindrome (255423324552).

The spelling of 133121203221 in words is "one hundred thirty-three billion, one hundred twenty-one million, two hundred three thousand, two hundred twenty-one".