20212211121 has 8 divisors (see below), whose sum is σ = 26951106624. Its totient is φ = 13474061520.

The previous prime is 20212211111. The next prime is 20212211161. The reversal of 20212211121 is 12111221202.

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

It is not a de Polignac number, because 20212211121 - 2⁶ = 20212211057 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20212211121.

It is not an unprimeable number, because it can be changed into a prime (20212211111) 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, 119845 + ... + 234066.

It is an arithmetic number, because the mean of its divisors is an integer number (3368888328).

Almost surely, 2^20212211121 is an apocalyptic number.

It is an amenable number.

20212211121 is a deficient number, since it is larger than the sum of its proper divisors (6738895503).

20212211121 is a wasteful number, since it uses less digits than its factorization.

20212211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372951.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20212211121 its reverse (12111221202), we get a palindrome (32323432323).

The spelling of 20212211121 in words is "twenty billion, two hundred twelve million, two hundred eleven thousand, one hundred twenty-one".