122111031011221 has 16 divisors (see below), whose sum is σ = 144252188753920. Its totient is φ = 101153192059440.

The previous prime is 122111031011183. The next prime is 122111031011339. The reversal of 122111031011221 is 122110130111221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122111031011221 is a prime.

It is a super-2 number, since 2×122111031011221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122111031012221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380572821 + ... + 380893546.

It is an arithmetic number, because the mean of its divisors is an integer number (9015761797120).

Almost surely, 2^{122111031011221} is an apocalyptic number.

It is an amenable number.

122111031011221 is a deficient number, since it is larger than the sum of its proper divisors (22141157742699).

122111031011221 is an equidigital number, since it uses as much as digits as its factorization.

122111031011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761467144.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 122111031011221 its reverse (122110130111221), we get a palindrome (244221161122442).

The spelling of 122111031011221 in words is "one hundred twenty-two trillion, one hundred eleven billion, thirty-one million, eleven thousand, two hundred twenty-one".