121421113403 has 2 divisors, whose sum is σ = 121421113404. Its totient is φ = 121421113402.

The previous prime is 121421113391. The next prime is 121421113433. The reversal of 121421113403 is 304311124121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121421113403 - 2⁶ = 121421113339 is a prime.

It is not a weakly prime, because it can be changed into another prime (121421113433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60710556701 + 60710556702.

It is an arithmetic number, because the mean of its divisors is an integer number (60710556702).

Almost surely, 2^121421113403 is an apocalyptic number.

121421113403 is a deficient number, since it is larger than the sum of its proper divisors (1).

121421113403 is an equidigital number, since it uses as much as digits as its factorization.

121421113403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 121421113403 its reverse (304311124121), we get a palindrome (425732237524).

The spelling of 121421113403 in words is "one hundred twenty-one billion, four hundred twenty-one million, one hundred thirteen thousand, four hundred three".