121222213211 has 4 divisors (see below), whose sum is σ = 132242414424. Its totient is φ = 110202012000.

The previous prime is 121222213181. The next prime is 121222213241. The reversal of 121222213211 is 112312222121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (121222213181) and next prime (121222213241).

It is a cyclic number.

It is not a de Polignac number, because 121222213211 - 2¹⁰ = 121222212187 is a prime.

It is a super-4 number, since 4×121222213211⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121222213241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5510100590 + ... + 5510100611.

It is an arithmetic number, because the mean of its divisors is an integer number (33060603606).

Almost surely, 2^121222213211 is an apocalyptic number.

121222213211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121222213211 is a deficient number, since it is larger than the sum of its proper divisors (11020201213).

121222213211 is a wasteful number, since it uses less digits than its factorization.

121222213211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11020201212.

The product of its digits is 192, while the sum is 20.

Adding to 121222213211 its reverse (112312222121), we get a palindrome (233534435332).

It can be divided in two parts, 121222 and 213211, that added together give a palindrome (334433).

The spelling of 121222213211 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred thirteen thousand, two hundred eleven".