20111200121 has 8 divisors (see below), whose sum is σ = 20761836288. Its totient is φ = 19460682000.

The previous prime is 20111200099. The next prime is 20111200133. The reversal of 20111200121 is 12100211102.

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 20111200121 - 2²⁶ = 20044091257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111200181) 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, 431066 + ... + 475436.

It is an arithmetic number, because the mean of its divisors is an integer number (2595229536).

Almost surely, 2^20111200121 is an apocalyptic number.

It is an amenable number.

20111200121 is a deficient number, since it is larger than the sum of its proper divisors (650636167).

20111200121 is a wasteful number, since it uses less digits than its factorization.

20111200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59023.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20111200121 its reverse (12100211102), we get a palindrome (32211411223).

The spelling of 20111200121 in words is "twenty billion, one hundred eleven million, two hundred thousand, one hundred twenty-one".