20010122221111 has 8 divisors (see below), whose sum is σ = 21856207222800. Its totient is φ = 18168534383040.

The previous prime is 20010122221099. The next prime is 20010122221247. The reversal of 20010122221111 is 11112222101002.

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 20010122221111 - 2⁵ = 20010122221079 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 (20010122821111) 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, 1124281596 + ... + 1124299393.

It is an arithmetic number, because the mean of its divisors is an integer number (2732025902850).

Almost surely, 2^{20010122221111} is an apocalyptic number.

20010122221111 is a deficient number, since it is larger than the sum of its proper divisors (1846085001689).

20010122221111 is a wasteful number, since it uses less digits than its factorization.

20010122221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248581809.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20010122221111 its reverse (11112222101002), we get a palindrome (31122344322113).

The spelling of 20010122221111 in words is "twenty trillion, ten billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred eleven".