20122211121 has 8 divisors (see below), whose sum is σ = 27754774080. Its totient is φ = 12952227792.

The previous prime is 20122211111. The next prime is 20122211141. The reversal of 20122211121 is 12111222102.

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

It is not a de Polignac number, because 20122211121 - 2¹⁷ = 20122080049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20122211121.

It is not an unprimeable number, because it can be changed into a prime (20122211101) 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, 115644805 + ... + 115644978.

It is an arithmetic number, because the mean of its divisors is an integer number (3469346760).

Almost surely, 2^20122211121 is an apocalyptic number.

It is an amenable number.

20122211121 is a deficient number, since it is larger than the sum of its proper divisors (7632562959).

20122211121 is a wasteful number, since it uses less digits than its factorization.

20122211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231289815.

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

Adding to 20122211121 its reverse (12111222102), we get a palindrome (32233433223).

The spelling of 20122211121 in words is "twenty billion, one hundred twenty-two million, two hundred eleven thousand, one hundred twenty-one".