20001112112021 has 4 divisors (see below), whose sum is σ = 21053802223200. Its totient is φ = 18948422000844.

The previous prime is 20001112112017. The next prime is 20001112112027. The reversal of 20001112112021 is 12021121110002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20001112112021 - 2² = 20001112112017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001112111987 and 20001112112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001112112027) 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, 526345055561 + ... + 526345055598.

It is an arithmetic number, because the mean of its divisors is an integer number (5263450555800).

Almost surely, 2^{20001112112021} is an apocalyptic number.

It is an amenable number.

20001112112021 is a deficient number, since it is larger than the sum of its proper divisors (1052690111179).

20001112112021 is a wasteful number, since it uses less digits than its factorization.

20001112112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052690111178.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20001112112021 its reverse (12021121110002), we get a palindrome (32022233222023).

The spelling of 20001112112021 in words is "twenty trillion, one billion, one hundred twelve million, one hundred twelve thousand, twenty-one".