133211421 has 12 divisors (see below), whose sum is σ = 219904672. Its totient is φ = 76120776.

The previous prime is 133211417. The next prime is 133211437. The reversal of 133211421 is 124112331.

133211421 is a `hidden beast` number, since 1 + 33 + 211 + 421 = 666.

It is not a de Polignac number, because 133211421 - 2² = 133211417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133211394 and 133211403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133211521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1057171 + ... + 1057296.

Almost surely, 2^133211421 is an apocalyptic number.

It is an amenable number.

133211421 is a deficient number, since it is larger than the sum of its proper divisors (86693251).

133211421 is a wasteful number, since it uses less digits than its factorization.

133211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114480 (or 2114477 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 133211421 is about 11541.7252176614. The cubic root of 133211421 is about 510.7172031643.

Adding to 133211421 its reverse (124112331), we get a palindrome (257323752).

The spelling of 133211421 in words is "one hundred thirty-three million, two hundred eleven thousand, four hundred twenty-one".