121323212011 has 6 divisors (see below), whose sum is σ = 122586870660. Its totient is φ = 120072447936.

The previous prime is 121323211991. The next prime is 121323212029. The reversal of 121323212011 is 110212323121.

It is not a de Polignac number, because 121323212011 - 2⁵ = 121323211979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121323212011.

It is not an unprimeable number, because it can be changed into a prime (121323212041) 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 5 ways as a sum of consecutive naturals, for example, 6437781 + ... + 6456598.

It is an arithmetic number, because the mean of its divisors is an integer number (20431145110).

Almost surely, 2^121323212011 is an apocalyptic number.

121323212011 is a deficient number, since it is larger than the sum of its proper divisors (1263658649).

121323212011 is an frugal number, since it uses more digits than its factorization.

121323212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12894573 (or 12894476 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121323212011 its reverse (110212323121), we get a palindrome (231535535132).

The spelling of 121323212011 in words is "one hundred twenty-one billion, three hundred twenty-three million, two hundred twelve thousand, eleven".