121012011 has 12 divisors (see below), whose sum is σ = 175276192. Its totient is φ = 80452656.

The previous prime is 121011997. The next prime is 121012013. The reversal of 121012011 is 110210121.

It is a happy number.

It is not a de Polignac number, because 121012011 - 2¹¹ = 121009963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121011984 and 121012002.

It is not an unprimeable number, because it can be changed into a prime (121012013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15016 + ... + 21621.

Almost surely, 2^121012011 is an apocalyptic number.

121012011 is a deficient number, since it is larger than the sum of its proper divisors (54264181).

121012011 is a wasteful number, since it uses less digits than its factorization.

121012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37010 (or 37007 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 121012011 is about 11000.5459409977. The cubic root of 121012011 is about 494.6251094738.

Adding to 121012011 its reverse (110210121), we get a palindrome (231222132).

The spelling of 121012011 in words is "one hundred twenty-one million, twelve thousand, eleven".