121301431011 has 20 divisors (see below), whose sum is σ = 181388959752. Its totient is φ = 80784796608.

The previous prime is 121301431007. The next prime is 121301431019. The reversal of 121301431011 is 110134103121.

It is a happy number.

It is not a de Polignac number, because 121301431011 - 2² = 121301431007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121301431019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 687265 + ... + 845538.

Almost surely, 2^121301431011 is an apocalyptic number.

121301431011 is a deficient number, since it is larger than the sum of its proper divisors (60087528741).

121301431011 is an equidigital number, since it uses as much as digits as its factorization.

121301431011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533792 (or 1533783 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121301431011 its reverse (110134103121), we get a palindrome (231435534132).

The spelling of 121301431011 in words is "one hundred twenty-one billion, three hundred one million, four hundred thirty-one thousand, eleven".