4021404421987 has 2 divisors, whose sum is σ = 4021404421988. Its totient is φ = 4021404421986.

The previous prime is 4021404421961. The next prime is 4021404422033. The reversal of 4021404421987 is 7891244041204.

It is an a-pointer prime, because the next prime (4021404422033) can be obtained adding 4021404421987 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4021404421987 - 2³¹ = 4019256938339 is a prime.

It is not a weakly prime, because it can be changed into another prime (4021404421387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010702210993 + 2010702210994.

It is an arithmetic number, because the mean of its divisors is an integer number (2010702210994).

Almost surely, 2^{4021404421987} is an apocalyptic number.

4021404421987 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021404421987 is an equidigital number, since it uses as much as digits as its factorization.

4021404421987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 4021404421987 in words is "four trillion, twenty-one billion, four hundred four million, four hundred twenty-one thousand, nine hundred eighty-seven".