20213321122999 has 4 divisors (see below), whose sum is σ = 20213826029064. Its totient is φ = 20212816216936.

The previous prime is 20213321122991. The next prime is 20213321123153. The reversal of 20213321122999 is 99922112331202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20213321122999 - 2³ = 20213321122991 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 (20213321122991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252392977 + ... + 252473050.

It is an arithmetic number, because the mean of its divisors is an integer number (5053456507266).

Almost surely, 2^{20213321122999} is an apocalyptic number.

20213321122999 is a deficient number, since it is larger than the sum of its proper divisors (504906065).

20213321122999 is an equidigital number, since it uses as much as digits as its factorization.

20213321122999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504906064.

The product of its (nonzero) digits is 209952, while the sum is 46.

The spelling of 20213321122999 in words is "twenty trillion, two hundred thirteen billion, three hundred twenty-one million, one hundred twenty-two thousand, nine hundred ninety-nine".