121312011 has 8 divisors (see below), whose sum is σ = 166121104. Its totient is φ = 78688800.

The previous prime is 121312007. The next prime is 121312013. The reversal of 121312011 is 110213121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121312011 - 2² = 121312007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121312013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546340 + ... + 546561.

It is an arithmetic number, because the mean of its divisors is an integer number (20765138).

Almost surely, 2^121312011 is an apocalyptic number.

121312011 is a deficient number, since it is larger than the sum of its proper divisors (44809093).

121312011 is a wasteful number, since it uses less digits than its factorization.

121312011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092941.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 121312011 is about 11014.1731873073. The cubic root of 121312011 is about 495.0335126785.

Adding to 121312011 its reverse (110213121), we get a palindrome (231525132).

The spelling of 121312011 in words is "one hundred twenty-one million, three hundred twelve thousand, eleven".