421204078711387 has 2 divisors, whose sum is σ = 421204078711388. Its totient is φ = 421204078711386.

The previous prime is 421204078711379. The next prime is 421204078711411. The reversal of 421204078711387 is 783117870402124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421204078711387 - 2³ = 421204078711379 is a prime.

It is not a weakly prime, because it can be changed into another prime (421204078711307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210602039355693 + 210602039355694.

It is an arithmetic number, because the mean of its divisors is an integer number (210602039355694).

Almost surely, 2^{421204078711387} is an apocalyptic number.

421204078711387 is a deficient number, since it is larger than the sum of its proper divisors (1).

421204078711387 is an equidigital number, since it uses as much as digits as its factorization.

421204078711387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4214784, while the sum is 55.

The spelling of 421204078711387 in words is "four hundred twenty-one trillion, two hundred four billion, seventy-eight million, seven hundred eleven thousand, three hundred eighty-seven".