20102211122221 has 8 divisors (see below), whose sum is σ = 20976456968640. Its totient is φ = 19227984998112.

The previous prime is 20102211122171. The next prime is 20102211122233. The reversal of 20102211122221 is 12222111220102.

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

It is not a de Polignac number, because 20102211122221 - 2²¹ = 20102209025069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102211122251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2828656 + ... + 6943033.

It is an arithmetic number, because the mean of its divisors is an integer number (2622057121080).

Almost surely, 2^{20102211122221} is an apocalyptic number.

It is an amenable number.

20102211122221 is a deficient number, since it is larger than the sum of its proper divisors (874245846419).

20102211122221 is an equidigital number, since it uses as much as digits as its factorization.

20102211122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9861155.

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

Adding to 20102211122221 its reverse (12222111220102), we get a palindrome (32324322342323).

The spelling of 20102211122221 in words is "twenty trillion, one hundred two billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twenty-one".