20102222112121 has 16 divisors (see below), whose sum is σ = 20600575153920. Its totient is φ = 19609562227840.

The previous prime is 20102222112073. The next prime is 20102222112143. The reversal of 20102222112121 is 12121122220102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102222112121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102222112521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3427776 + ... + 7207918.

It is an arithmetic number, because the mean of its divisors is an integer number (1287535947120).

Almost surely, 2^{20102222112121} is an apocalyptic number.

It is an amenable number.

20102222112121 is a deficient number, since it is larger than the sum of its proper divisors (498353041799).

20102222112121 is a wasteful number, since it uses less digits than its factorization.

20102222112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780896.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20102222112121 its reverse (12121122220102), we get a palindrome (32223344332223).

The spelling of 20102222112121 in words is "twenty trillion, one hundred two billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twenty-one".