20012021121111 has 8 divisors (see below), whose sum is σ = 26682832274544. Its totient is φ = 13341278690880.

The previous prime is 20012021121083. The next prime is 20012021121137. The reversal of 20012021121111 is 11112112021002.

It is a happy number.

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

It is not a de Polignac number, because 20012021121111 - 2²⁶ = 20011954012247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012021120111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16497456 + ... + 17668901.

It is an arithmetic number, because the mean of its divisors is an integer number (3335354034318).

Almost surely, 2^{20012021121111} is an apocalyptic number.

20012021121111 is a deficient number, since it is larger than the sum of its proper divisors (6670811153433).

20012021121111 is a wasteful number, since it uses less digits than its factorization.

20012021121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34361601.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20012021121111 its reverse (11112112021002), we get a palindrome (31124133142113).

The spelling of 20012021121111 in words is "twenty trillion, twelve billion, twenty-one million, one hundred twenty-one thousand, one hundred eleven".