134400121221 has 8 divisors (see below), whose sum is σ = 179218829920. Its totient is φ = 89590746672.

The previous prime is 134400121171. The next prime is 134400121249. The reversal of 134400121221 is 122121004431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 134400121221 - 2⁶ = 134400121157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134400121291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2299870 + ... + 2357583.

It is an arithmetic number, because the mean of its divisors is an integer number (22402353740).

Almost surely, 2^134400121221 is an apocalyptic number.

It is an amenable number.

134400121221 is a deficient number, since it is larger than the sum of its proper divisors (44818708699).

134400121221 is an equidigital number, since it uses as much as digits as its factorization.

134400121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4667075.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 134400121221 its reverse (122121004431), we get a palindrome (256521125652).

The spelling of 134400121221 in words is "one hundred thirty-four billion, four hundred million, one hundred twenty-one thousand, two hundred twenty-one".