1022011231 has 4 divisors (see below), whose sum is σ = 1022082832. Its totient is φ = 1021939632.

The previous prime is 1022011213. The next prime is 1022011247. The reversal of 1022011231 is 1321102201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1022011231 - 2⁷ = 1022011103 is a prime.

It is a super-3 number, since 3×1022011231³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022017231) 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, 6270 + ... + 45643.

It is an arithmetic number, because the mean of its divisors is an integer number (255520708).

Almost surely, 2^1022011231 is an apocalyptic number.

1022011231 is a deficient number, since it is larger than the sum of its proper divisors (71601).

1022011231 is an equidigital number, since it uses as much as digits as its factorization.

1022011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71600.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1022011231 is about 31968.9103818069. The cubic root of 1022011231 is about 1007.2838930856.

Adding to 1022011231 its reverse (1321102201), we get a palindrome (2343113432).

The spelling of 1022011231 in words is "one billion, twenty-two million, eleven thousand, two hundred thirty-one".