121122122222211 has 32 divisors (see below), whose sum is σ = 177811185277440. Its totient is φ = 72726830380800.

The previous prime is 121122122222207. The next prime is 121122122222329. The reversal of 121122122222211 is 112222221221121.

It is not a de Polignac number, because 121122122222211 - 2² = 121122122222207 is a prime.

It is a super-2 number, since 2×121122122222211² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121122122223211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35575951 + ... + 38831591.

It is an arithmetic number, because the mean of its divisors is an integer number (5556599539920).

Almost surely, 2^{121122122222211} is an apocalyptic number.

121122122222211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121122122222211 is a deficient number, since it is larger than the sum of its proper divisors (56689063055229).

121122122222211 is a wasteful number, since it uses less digits than its factorization.

121122122222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266107.

The product of its digits is 512, while the sum is 24.

Adding to 121122122222211 its reverse (112222221221121), we get a palindrome (233344343443332).

It can be divided in two parts, 1211221 and 22222211, that added together give a palindrome (23433432).

The spelling of 121122122222211 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred eleven".