4021421953799 has 2 divisors, whose sum is σ = 4021421953800. Its totient is φ = 4021421953798.

The previous prime is 4021421953793. The next prime is 4021421953853. The reversal of 4021421953799 is 9973591241204.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4021421953799 - 2²⁴ = 4021405176583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021421953793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010710976899 + 2010710976900.

It is an arithmetic number, because the mean of its divisors is an integer number (2010710976900).

Almost surely, 2^{4021421953799} is an apocalyptic number.

4021421953799 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021421953799 is an equidigital number, since it uses as much as digits as its factorization.

4021421953799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 4021421953799 in words is "four trillion, twenty-one billion, four hundred twenty-one million, nine hundred fifty-three thousand, seven hundred ninety-nine".