799920213421 has 16 divisors (see below), whose sum is σ = 943565345280. Its totient is φ = 663964686000.

The previous prime is 799920213419. The next prime is 799920213461. The reversal of 799920213421 is 124312029997.

It is a happy number.

It is not a de Polignac number, because 799920213421 - 2¹ = 799920213419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (799920213461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14426455 + ... + 14481796.

It is an arithmetic number, because the mean of its divisors is an integer number (58972834080).

Almost surely, 2^799920213421 is an apocalyptic number.

It is an amenable number.

799920213421 is a deficient number, since it is larger than the sum of its proper divisors (143645131859).

799920213421 is a wasteful number, since it uses less digits than its factorization.

799920213421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28908384.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 799920213421 in words is "seven hundred ninety-nine billion, nine hundred twenty million, two hundred thirteen thousand, four hundred twenty-one".