121001222112211 has 16 divisors (see below), whose sum is σ = 138826791472320. Its totient is φ = 103310582169600.

The previous prime is 121001222112193. The next prime is 121001222112233. The reversal of 121001222112211 is 112211222100121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121001222112211 - 2¹¹ = 121001222110163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121001222112611) 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, 179003161 + ... + 179677861.

It is an arithmetic number, because the mean of its divisors is an integer number (8676674467020).

Almost surely, 2^{121001222112211} is an apocalyptic number.

121001222112211 is a deficient number, since it is larger than the sum of its proper divisors (17825569360109).

121001222112211 is an equidigital number, since it uses as much as digits as its factorization.

121001222112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774654.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121001222112211 its reverse (112211222100121), we get a palindrome (233212444212332).

The spelling of 121001222112211 in words is "one hundred twenty-one trillion, one billion, two hundred twenty-two million, one hundred twelve thousand, two hundred eleven".