1406334451221 has 24 divisors (see below), whose sum is σ = 2324997252864. Its totient is φ = 802432631520.

The previous prime is 1406334451217. The next prime is 1406334451231. The reversal of 1406334451221 is 1221544336041.

1406334451221 is a `hidden beast` number, since 1 + 4 + 0 + 633 + 4 + 4 + 5 + 12 + 2 + 1 = 666.

It is not a de Polignac number, because 1406334451221 - 2² = 1406334451217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406334451231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16443885 + ... + 16529186.

It is an arithmetic number, because the mean of its divisors is an integer number (96874885536).

Almost surely, 2^{1406334451221} is an apocalyptic number.

It is an amenable number.

1406334451221 is a deficient number, since it is larger than the sum of its proper divisors (918662801643).

1406334451221 is a wasteful number, since it uses less digits than its factorization.

1406334451221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32973761 (or 32973758 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 1406334451221 its reverse (1221544336041), we get a palindrome (2627878787262).

The spelling of 1406334451221 in words is "one trillion, four hundred six billion, three hundred thirty-four million, four hundred fifty-one thousand, two hundred twenty-one".