133111223421 has 32 divisors (see below), whose sum is σ = 203473678848. Its totient is φ = 76667653440.

The previous prime is 133111223407. The next prime is 133111223437. The reversal of 133111223421 is 124322111331.

It is a de Polignac number, because none of the positive numbers 2^k-133111223421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133111223391 and 133111223400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133111228421) 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, 1215151 + ... + 1320156.

It is an arithmetic number, because the mean of its divisors is an integer number (6358552464).

Almost surely, 2^133111223421 is an apocalyptic number.

133111223421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133111223421 is a deficient number, since it is larger than the sum of its proper divisors (70362455427).

133111223421 is a wasteful number, since it uses less digits than its factorization.

133111223421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535401.

The product of its digits is 864, while the sum is 24.

Adding to 133111223421 its reverse (124322111331), we get a palindrome (257433334752).

The spelling of 133111223421 in words is "one hundred thirty-three billion, one hundred eleven million, two hundred twenty-three thousand, four hundred twenty-one".