1012121099 has 8 divisors (see below), whose sum is σ = 1106553648. Its totient is φ = 918092160.

The previous prime is 1012121081. The next prime is 1012121113. The reversal of 1012121099 is 9901212101.

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 1012121099 - 2⁸ = 1012120843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012121009) 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 7 ways as a sum of consecutive naturals, for example, 95642 + ... + 105695.

It is an arithmetic number, because the mean of its divisors is an integer number (138319206).

Almost surely, 2^1012121099 is an apocalyptic number.

1012121099 is a deficient number, since it is larger than the sum of its proper divisors (94432549).

1012121099 is a wasteful number, since it uses less digits than its factorization.

1012121099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201805.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 1012121099 is about 31813.8507414617. The cubic root of 1012121099 is about 1004.0241508214.

The spelling of 1012121099 in words is "one billion, twelve million, one hundred twenty-one thousand, ninety-nine".