1100012121 has 24 divisors (see below), whose sum is σ = 1712256000. Its totient is φ = 676485216.

The previous prime is 1100012119. The next prime is 1100012131. The reversal of 1100012121 is 1212100011.

It is a happy number.

It is not a de Polignac number, because 1100012121 - 2¹ = 1100012119 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1100012131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 312630 + ... + 316128.

It is an arithmetic number, because the mean of its divisors is an integer number (71344000).

Almost surely, 2^1100012121 is an apocalyptic number.

It is an amenable number.

1100012121 is a deficient number, since it is larger than the sum of its proper divisors (612243879).

1100012121 is a wasteful number, since it uses less digits than its factorization.

1100012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6205 (or 6202 counting only the distinct ones).

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

The square root of 1100012121 is about 33166.4306340010. The cubic root of 1100012121 is about 1032.2839070386.

Adding to 1100012121 its reverse (1212100011), we get a palindrome (2312112132).

The spelling of 1100012121 in words is "one billion, one hundred million, twelve thousand, one hundred twenty-one".