121012112011 has 12 divisors (see below), whose sum is σ = 141136756992. Its totient is φ = 103453829808.

The previous prime is 121012111973. The next prime is 121012112063. The reversal of 121012112011 is 110211210121.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-121012112011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121012111982 and 121012112000.

It is not an unprimeable number, because it can be changed into a prime (121012112411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3205300 + ... + 3242833.

It is an arithmetic number, because the mean of its divisors is an integer number (11761396416).

Almost surely, 2^121012112011 is an apocalyptic number.

121012112011 is a deficient number, since it is larger than the sum of its proper divisors (20124644981).

121012112011 is an equidigital number, since it uses as much as digits as its factorization.

121012112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6448530 (or 6448523 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121012112011 its reverse (110211210121), we get a palindrome (231223322132).

The spelling of 121012112011 in words is "one hundred twenty-one billion, twelve million, one hundred twelve thousand, eleven".