1021131121 has 16 divisors (see below), whose sum is σ = 1050192000. Its totient is φ = 992585088.

The previous prime is 1021131107. The next prime is 1021131149. The reversal of 1021131121 is 1211311201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1021131121 - 2¹¹ = 1021129073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021131101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2325820 + ... + 2326258.

It is an arithmetic number, because the mean of its divisors is an integer number (65637000).

Almost surely, 2^1021131121 is an apocalyptic number.

It is an amenable number.

1021131121 is a deficient number, since it is larger than the sum of its proper divisors (29060879).

1021131121 is a wasteful number, since it uses less digits than its factorization.

1021131121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888.

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

The square root of 1021131121 is about 31955.1423248278. The cubic root of 1021131121 is about 1006.9946675536.

Adding to 1021131121 its reverse (1211311201), we get a palindrome (2232442322).

The spelling of 1021131121 in words is "one billion, twenty-one million, one hundred thirty-one thousand, one hundred twenty-one".