20111202101121 has 8 divisors (see below), whose sum is σ = 27539664138624. Its totient is φ = 13045104065520.

The previous prime is 20111202101087. The next prime is 20111202101131. The reversal of 20111202101121 is 12110120211102.

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 20111202101121 - 2¹⁹ = 20111201576833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20111202101121.

It is not an unprimeable number, because it can be changed into a prime (20111202101131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90591000345 + ... + 90591000566.

It is an arithmetic number, because the mean of its divisors is an integer number (3442458017328).

Almost surely, 2^{20111202101121} is an apocalyptic number.

It is an amenable number.

20111202101121 is a deficient number, since it is larger than the sum of its proper divisors (7428462037503).

20111202101121 is a wasteful number, since it uses less digits than its factorization.

20111202101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181182000951.

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

Adding to 20111202101121 its reverse (12110120211102), we get a palindrome (32221322312223).

The spelling of 20111202101121 in words is "twenty trillion, one hundred eleven billion, two hundred two million, one hundred one thousand, one hundred twenty-one".