1021131011 has 4 divisors (see below), whose sum is σ = 1034056800. Its totient is φ = 1008205224.

The previous prime is 1021130951. The next prime is 1021131029. The reversal of 1021131011 is 1101311201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1021131011 - 2⁶ = 1021130947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021130983 and 1021131001.

It is not an unprimeable number, because it can be changed into a prime (1021131091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6462776 + ... + 6462933.

It is an arithmetic number, because the mean of its divisors is an integer number (258514200).

Almost surely, 2^1021131011 is an apocalyptic number.

1021131011 is a deficient number, since it is larger than the sum of its proper divisors (12925789).

1021131011 is an equidigital number, since it uses as much as digits as its factorization.

1021131011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12925788.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1021131011 is about 31955.1406036650. The cubic root of 1021131011 is about 1006.9946313945.

Adding to 1021131011 its reverse (1101311201), we get a palindrome (2122442212).

The spelling of 1021131011 in words is "one billion, twenty-one million, one hundred thirty-one thousand, eleven".