122512215221 has 16 divisors (see below), whose sum is σ = 133956592128. Its totient is φ = 111119190000.

The previous prime is 122512215209. The next prime is 122512215247.

122512215221 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122512215221 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 (122512215271) 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, 19558136 + ... + 19564398.

It is an arithmetic number, because the mean of its divisors is an integer number (8372287008).

Almost surely, 2^122512215221 is an apocalyptic number.

122512215221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122512215221 is a deficient number, since it is larger than the sum of its proper divisors (11444376907).

122512215221 is a wasteful number, since it uses less digits than its factorization.

122512215221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10072.

The product of its digits is 1600, while the sum is 26.

It can be divided in two parts, 122512 and 215221, that added together give a palindrome (337733).

The spelling of 122512215221 in words is "one hundred twenty-two billion, five hundred twelve million, two hundred fifteen thousand, two hundred twenty-one".