133011211111221 has 16 divisors (see below), whose sum is σ = 180264298739328. Its totient is φ = 87216271924800.

The previous prime is 133011211111199. The next prime is 133011211111223. The reversal of 133011211111221 is 122111112110331.

It is not a de Polignac number, because 133011211111221 - 2²¹ = 133011209014069 is a prime.

It is a super-2 number, since 2×133011211111221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133011211111223) 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, 13658490 + ... + 21273851.

It is an arithmetic number, because the mean of its divisors is an integer number (11266518671208).

Almost surely, 2^{133011211111221} is an apocalyptic number.

It is an amenable number.

133011211111221 is a deficient number, since it is larger than the sum of its proper divisors (47253087628107).

133011211111221 is a wasteful number, since it uses less digits than its factorization.

133011211111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34953212.

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 133011211111221 its reverse (122111112110331), we get a palindrome (255122323221552).

The spelling of 133011211111221 in words is "one hundred thirty-three trillion, eleven billion, two hundred eleven million, one hundred eleven thousand, two hundred twenty-one".