122212212120021 has 16 divisors (see below), whose sum is σ = 165383192235968. Its totient is φ = 80258041987200.

The previous prime is 122212212119951. The next prime is 122212212120043. The reversal of 122212212120021 is 120021212212221.

It is not a de Polignac number, because 122212212120021 - 2¹⁸ = 122212211857877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122212212120021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122212212120071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20058831 + ... + 25431891.

It is an arithmetic number, because the mean of its divisors is an integer number (10336449514748).

Almost surely, 2^{122212212120021} is an apocalyptic number.

It is an amenable number.

122212212120021 is a deficient number, since it is larger than the sum of its proper divisors (43170980115947).

122212212120021 is a wasteful number, since it uses less digits than its factorization.

122212212120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5486292.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 122212212120021 its reverse (120021212212221), we get a palindrome (242233424332242).

The spelling of 122212212120021 in words is "one hundred twenty-two trillion, two hundred twelve billion, two hundred twelve million, one hundred twenty thousand, twenty-one".