1021220143 has 2 divisors, whose sum is σ = 1021220144. Its totient is φ = 1021220142.

The previous prime is 1021220129. The next prime is 1021220257. The reversal of 1021220143 is 3410221201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021220143 - 2²¹ = 1019122991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021224143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510610071 + 510610072.

It is an arithmetic number, because the mean of its divisors is an integer number (510610072).

Almost surely, 2^1021220143 is an apocalyptic number.

1021220143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021220143 is an equidigital number, since it uses as much as digits as its factorization.

1021220143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1021220143 is about 31956.5352158209. The cubic root of 1021220143 is about 1007.0239298989.

Adding to 1021220143 its reverse (3410221201), we get a palindrome (4431441344).

The spelling of 1021220143 in words is "one billion, twenty-one million, two hundred twenty thousand, one hundred forty-three".