20021201001995 has 8 divisors (see below), whose sum is σ = 24025640382816. Its totient is φ = 16016828014656.

The previous prime is 20021201001979. The next prime is 20021201002027. The reversal of 20021201001995 is 59910010212002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20021201001995 - 2⁴ = 20021201001979 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15932522 + ... + 17143151.

It is an arithmetic number, because the mean of its divisors is an integer number (3003205047852).

Almost surely, 2^{20021201001995} is an apocalyptic number.

20021201001995 is a deficient number, since it is larger than the sum of its proper divisors (4004439380821).

20021201001995 is a wasteful number, since it uses less digits than its factorization.

20021201001995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33196741.

The product of its (nonzero) digits is 3240, while the sum is 32.

Adding to 20021201001995 its reverse (59910010212002), we get a palindrome (79931211213997).

The spelling of 20021201001995 in words is "twenty trillion, twenty-one billion, two hundred one million, one thousand, nine hundred ninety-five".