1021131311 has 8 divisors (see below), whose sum is σ = 1033544784. Its totient is φ = 1008763200.

The previous prime is 1021131283. The next prime is 1021131323. The reversal of 1021131311 is 1131311201.

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 1021131311 - 2⁶ = 1021131247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021131361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35096 + ... + 57218.

It is an arithmetic number, because the mean of its divisors is an integer number (129193098).

Almost surely, 2^1021131311 is an apocalyptic number.

1021131311 is a deficient number, since it is larger than the sum of its proper divisors (12413473).

1021131311 is a wasteful number, since it uses less digits than its factorization.

1021131311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22681.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1021131311 is about 31955.1452977451. The cubic root of 1021131311 is about 1006.9947300101.

Adding to 1021131311 its reverse (1131311201), we get a palindrome (2152442512).

The spelling of 1021131311 in words is "one billion, twenty-one million, one hundred thirty-one thousand, three hundred eleven".