121222212011 has 4 divisors (see below), whose sum is σ = 126492742992. Its totient is φ = 115951681032.

The previous prime is 121222211989. The next prime is 121222212019. The reversal of 121222212011 is 110212222121.

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

It is a cyclic number.

It is not a de Polignac number, because 121222212011 - 2¹⁸ = 121221949867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121222212019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2635265456 + ... + 2635265501.

It is an arithmetic number, because the mean of its divisors is an integer number (31623185748).

Almost surely, 2^121222212011 is an apocalyptic number.

121222212011 is a deficient number, since it is larger than the sum of its proper divisors (5270530981).

121222212011 is an equidigital number, since it uses as much as digits as its factorization.

121222212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5270530980.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121222212011 its reverse (110212222121), we get a palindrome (231434434132).

The spelling of 121222212011 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, eleven".