1012131121 has 8 divisors (see below), whose sum is σ = 1099769600. Its totient is φ = 927929520.

The previous prime is 1012131103. The next prime is 1012131143. The reversal of 1012131121 is 1211312101.

It is a happy number.

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 1012131121 - 2⁷ = 1012130993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012131191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858606 + ... + 859783.

It is an arithmetic number, because the mean of its divisors is an integer number (137471200).

Almost surely, 2^1012131121 is an apocalyptic number.

It is an amenable number.

1012131121 is a deficient number, since it is larger than the sum of its proper divisors (87638479).

1012131121 is a wasteful number, since it uses less digits than its factorization.

1012131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718439.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1012131121 is about 31814.0082510834. The cubic root of 1012131121 is about 1004.0274647519.

Adding to 1012131121 its reverse (1211312101), we get a palindrome (2223443222).

The spelling of 1012131121 in words is "one billion, twelve million, one hundred thirty-one thousand, one hundred twenty-one".