1021313131 has 8 divisors (see below), whose sum is σ = 1082157840. Its totient is φ = 960553728.

The previous prime is 1021313129. The next prime is 1021313141. The reversal of 1021313131 is 1313131201.

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 1021313131 - 2¹ = 1021313129 is a prime.

It is a super-2 number, since 2×1021313131² = 2086161023106046322, which contains 22 as substring.

It is a Duffinian number.

1021313131 is a modest number, since divided by 13131 gives 10213 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1021313141) 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, 4215 + ... + 45391.

It is an arithmetic number, because the mean of its divisors is an integer number (135269730).

Almost surely, 2^1021313131 is an apocalyptic number.

1021313131 is a deficient number, since it is larger than the sum of its proper divisors (60844709).

1021313131 is a wasteful number, since it uses less digits than its factorization.

1021313131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42653.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1021313131 is about 31957.9900963750. The cubic root of 1021313131 is about 1007.0544940888.

Adding to 1021313131 its reverse (1313131201), we get a palindrome (2334444332).

The spelling of 1021313131 in words is "one billion, twenty-one million, three hundred thirteen thousand, one hundred thirty-one".