122100021111 has 32 divisors (see below), whose sum is σ = 172948573440. Its totient is φ = 76357983744.

The previous prime is 122100021107. The next prime is 122100021139. The reversal of 122100021111 is 111120001221.

It is not a de Polignac number, because 122100021111 - 2² = 122100021107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122100021181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20611596 + ... + 20617518.

It is an arithmetic number, because the mean of its divisors is an integer number (5404642920).

Almost surely, 2^122100021111 is an apocalyptic number.

122100021111 is a deficient number, since it is larger than the sum of its proper divisors (50848552329).

122100021111 is a wasteful number, since it uses less digits than its factorization.

122100021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7215.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 122100021111 its reverse (111120001221), we get a palindrome (233220022332).

The spelling of 122100021111 in words is "one hundred twenty-two billion, one hundred million, twenty-one thousand, one hundred eleven".