121122222011 has 4 divisors (see below), whose sum is σ = 138425396592. Its totient is φ = 103819047432.

The previous prime is 121122221977. The next prime is 121122222061. The reversal of 121122222011 is 110222221121.

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 121122222011 - 2¹⁴ = 121122205627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121122222061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8651587280 + ... + 8651587293.

It is an arithmetic number, because the mean of its divisors is an integer number (34606349148).

Almost surely, 2^121122222011 is an apocalyptic number.

121122222011 is a deficient number, since it is larger than the sum of its proper divisors (17303174581).

121122222011 is an equidigital number, since it uses as much as digits as its factorization.

121122222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17303174580.

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

Adding to 121122222011 its reverse (110222221121), we get a palindrome (231344443132).

The spelling of 121122222011 in words is "one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, eleven".