121420201403 has 4 divisors (see below), whose sum is σ = 122193578640. Its totient is φ = 120646824168.

The previous prime is 121420201391. The next prime is 121420201433. The reversal of 121420201403 is 304102024121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304102024121 = 7 ⋅43443146303.

It is a cyclic number.

It is not a de Polignac number, because 121420201403 - 2⁴ = 121420201387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121420201433) 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, 386688383 + ... + 386688696.

It is an arithmetic number, because the mean of its divisors is an integer number (30548394660).

Almost surely, 2^121420201403 is an apocalyptic number.

121420201403 is a deficient number, since it is larger than the sum of its proper divisors (773377237).

121420201403 is an equidigital number, since it uses as much as digits as its factorization.

121420201403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773377236.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 121420201403 its reverse (304102024121), we get a palindrome (425522225524).

The spelling of 121420201403 in words is "one hundred twenty-one billion, four hundred twenty million, two hundred one thousand, four hundred three".