20122101221111 has 8 divisors (see below), whose sum is σ = 20422591505904. Its totient is φ = 19822282424640.

The previous prime is 20122101221107. The next prime is 20122101221273. The reversal of 20122101221111 is 11112210122102.

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

It is a cyclic number.

It is not a de Polignac number, because 20122101221111 - 2² = 20122101221107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20122101221111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122101281111) 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, 167811701 + ... + 167931566.

It is an arithmetic number, because the mean of its divisors is an integer number (2552823938238).

Almost surely, 2^{20122101221111} is an apocalyptic number.

20122101221111 is a deficient number, since it is larger than the sum of its proper divisors (300490284793).

20122101221111 is an equidigital number, since it uses as much as digits as its factorization.

20122101221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335744161.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20122101221111 its reverse (11112210122102), we get a palindrome (31234311343213).

The spelling of 20122101221111 in words is "twenty trillion, one hundred twenty-two billion, one hundred one million, two hundred twenty-one thousand, one hundred eleven".