20111200122221 has 8 divisors (see below), whose sum is σ = 22798121596320. Its totient is φ = 17587122373872.

The previous prime is 20111200122193. The next prime is 20111200122241. The reversal of 20111200122221 is 12222100211102.

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 20111200122221 - 2¹⁸ = 20111199860077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20111200122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111200122241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40710931175 + ... + 40710931668.

It is an arithmetic number, because the mean of its divisors is an integer number (2849765199540).

Almost surely, 2^{20111200122221} is an apocalyptic number.

It is an amenable number.

20111200122221 is a deficient number, since it is larger than the sum of its proper divisors (2686921474099).

20111200122221 is a wasteful number, since it uses less digits than its factorization.

20111200122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81421862875.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20111200122221 its reverse (12222100211102), we get a palindrome (32333300333323).

The spelling of 20111200122221 in words is "twenty trillion, one hundred eleven billion, two hundred million, one hundred twenty-two thousand, two hundred twenty-one".