1012013121 has 24 divisors (see below), whose sum is σ = 1581665184. Its totient is φ = 573867840.

The previous prime is 1012013117. The next prime is 1012013137. The reversal of 1012013121 is 1213102101.

It is not a de Polignac number, because 1012013121 - 2² = 1012013117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012013097 and 1012013106.

It is not an unprimeable number, because it can be changed into a prime (1012013141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7020 + ... + 45533.

It is an arithmetic number, because the mean of its divisors is an integer number (65902716).

Almost surely, 2^1012013121 is an apocalyptic number.

It is an amenable number.

1012013121 is a deficient number, since it is larger than the sum of its proper divisors (569652063).

1012013121 is a wasteful number, since it uses less digits than its factorization.

1012013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52701 (or 52694 counting only the distinct ones).

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

The square root of 1012013121 is about 31812.1536680559. The cubic root of 1012013121 is about 1003.9884448256.

Adding to 1012013121 its reverse (1213102101), we get a palindrome (2225115222).

The spelling of 1012013121 in words is "one billion, twelve million, thirteen thousand, one hundred twenty-one".