1012121011 has 8 divisors (see below), whose sum is σ = 1108873584. Its totient is φ = 916158720.

The previous prime is 1012121009. The next prime is 1012121021. The reversal of 1012121011 is 1101212101.

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

It is a cyclic number.

It is not a de Polignac number, because 1012121011 - 2¹ = 1012121009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012121021) 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 7 ways as a sum of consecutive naturals, for example, 194886 + ... + 200011.

It is an arithmetic number, because the mean of its divisors is an integer number (138609198).

Almost surely, 2^1012121011 is an apocalyptic number.

1012121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1012121011 is a deficient number, since it is larger than the sum of its proper divisors (96752573).

1012121011 is a wasteful number, since it uses less digits than its factorization.

1012121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395141.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1012121011 is about 31813.8493584162. The cubic root of 1012121011 is about 1004.0241217227.

Adding to 1012121011 its reverse (1101212101), we get a palindrome (2113333112).

The spelling of 1012121011 in words is "one billion, twelve million, one hundred twenty-one thousand, eleven".