20010211211121 has 16 divisors (see below), whose sum is σ = 28607301216000. Its totient is φ = 12396497188608.

The previous prime is 20010211211083. The next prime is 20010211211129. The reversal of 20010211211121 is 12111211201002.

It is a happy number.

It is not a de Polignac number, because 20010211211121 - 2⁷ = 20010211210993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20010211211121.

It is not an unprimeable number, because it can be changed into a prime (20010211211129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2483268646 + ... + 2483276703.

It is an arithmetic number, because the mean of its divisors is an integer number (1787956326000).

Almost surely, 2^{20010211211121} is an apocalyptic number.

It is an amenable number.

20010211211121 is a deficient number, since it is larger than the sum of its proper divisors (8597090004879).

20010211211121 is a wasteful number, since it uses less digits than its factorization.

20010211211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4966545448.

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

Adding to 20010211211121 its reverse (12111211201002), we get a palindrome (32121422412123).

The spelling of 20010211211121 in words is "twenty trillion, ten billion, two hundred eleven million, two hundred eleven thousand, one hundred twenty-one".