121397421371 has 2 divisors, whose sum is σ = 121397421372. Its totient is φ = 121397421370.

The previous prime is 121397421317. The next prime is 121397421377. The reversal of 121397421371 is 173124793121.

Together with previous prime (121397421317) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121397421371 is a prime.

It is not a weakly prime, because it can be changed into another prime (121397421377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60698710685 + 60698710686.

It is an arithmetic number, because the mean of its divisors is an integer number (60698710686).

Almost surely, 2^121397421371 is an apocalyptic number.

121397421371 is a deficient number, since it is larger than the sum of its proper divisors (1).

121397421371 is an equidigital number, since it uses as much as digits as its factorization.

121397421371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The spelling of 121397421371 in words is "one hundred twenty-one billion, three hundred ninety-seven million, four hundred twenty-one thousand, three hundred seventy-one".