121333401421 has 4 divisors (see below), whose sum is σ = 125247382144. Its totient is φ = 117419420700.

The previous prime is 121333401379. The next prime is 121333401493. The reversal of 121333401421 is 124104333121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121333401421 - 2¹¹ = 121333399373 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 (121333407421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1956990315 + ... + 1956990376.

It is an arithmetic number, because the mean of its divisors is an integer number (31311845536).

Almost surely, 2^121333401421 is an apocalyptic number.

It is an amenable number.

121333401421 is a deficient number, since it is larger than the sum of its proper divisors (3913980723).

121333401421 is an equidigital number, since it uses as much as digits as its factorization.

121333401421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913980722.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 121333401421 its reverse (124104333121), we get a palindrome (245437734542).

The spelling of 121333401421 in words is "one hundred twenty-one billion, three hundred thirty-three million, four hundred one thousand, four hundred twenty-one".