1023111421 has 2 divisors, whose sum is σ = 1023111422. Its totient is φ = 1023111420.

The previous prime is 1023111413. The next prime is 1023111451. The reversal of 1023111421 is 1241113201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1023104196 + 7225 = 31986^2 + 85^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023111421 - 2³ = 1023111413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1023111395 and 1023111404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023111451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511555710 + 511555711.

It is an arithmetic number, because the mean of its divisors is an integer number (511555711).

Almost surely, 2^1023111421 is an apocalyptic number.

It is an amenable number.

1023111421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023111421 is an equidigital number, since it uses as much as digits as its factorization.

1023111421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1023111421 is about 31986.1129398369. The cubic root of 1023111421 is about 1007.6452088298.

Adding to 1023111421 its reverse (1241113201), we get a palindrome (2264224622).

The spelling of 1023111421 in words is "one billion, twenty-three million, one hundred eleven thousand, four hundred twenty-one".