1021223131 has 4 divisors (see below), whose sum is σ = 1028570200. Its totient is φ = 1013876064.

The previous prime is 1021223107. The next prime is 1021223141. The reversal of 1021223131 is 1313221201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1313221201 = 17783 ⋅73847.

It is a cyclic number.

It is not a de Polignac number, because 1021223131 - 2⁹ = 1021222619 is a prime.

It is a super-2 number, since 2×1021223131² = 2085793366578886322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021223101) 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, 3673326 + ... + 3673603.

It is an arithmetic number, because the mean of its divisors is an integer number (257142550).

Almost surely, 2^1021223131 is an apocalyptic number.

1021223131 is a deficient number, since it is larger than the sum of its proper divisors (7347069).

1021223131 is an equidigital number, since it uses as much as digits as its factorization.

1021223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7347068.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1021223131 is about 31956.5819667874. The cubic root of 1021223131 is about 1007.0249120523.

Adding to 1021223131 its reverse (1313221201), we get a palindrome (2334444332).

The spelling of 1021223131 in words is "one billion, twenty-one million, two hundred twenty-three thousand, one hundred thirty-one".