122221012021111 has 16 divisors (see below), whose sum is σ = 126682250037120. Its totient is φ = 117841025629600.

The previous prime is 122221012021091. The next prime is 122221012021117. The reversal of 122221012021111 is 111120210122221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122221012021111 - 2¹³ = 122221012012919 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 (122221012021117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2016036 + ... + 15764086.

It is an arithmetic number, because the mean of its divisors is an integer number (7917640627320).

Almost surely, 2^{122221012021111} is an apocalyptic number.

122221012021111 is a deficient number, since it is larger than the sum of its proper divisors (4461238016009).

122221012021111 is a wasteful number, since it uses less digits than its factorization.

122221012021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13751006.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 122221012021111 its reverse (111120210122221), we get a palindrome (233341222143332).

The spelling of 122221012021111 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, twelve million, twenty-one thousand, one hundred eleven".