20121111100201 has 8 divisors (see below), whose sum is σ = 21184905667520. Its totient is φ = 19057795404912.

The previous prime is 20121111100171. The next prime is 20121111100249. The reversal of 20121111100201 is 10200111112102.

It is a happy number.

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 20121111100201 - 2¹³ = 20121111092009 is a prime.

It is a super-2 number, since 2×20121111100201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121111100301) 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, 119631750 + ... + 119799823.

It is an arithmetic number, because the mean of its divisors is an integer number (2648113208440).

Almost surely, 2^{20121111100201} is an apocalyptic number.

It is an amenable number.

20121111100201 is a deficient number, since it is larger than the sum of its proper divisors (1063794567319).

20121111100201 is a wasteful number, since it uses less digits than its factorization.

20121111100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239436015.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20121111100201 its reverse (10200111112102), we get a palindrome (30321222212303).

The spelling of 20121111100201 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, one hundred thousand, two hundred one".