1021123043 has 6 divisors (see below), whose sum is σ = 1055126052. Its totient is φ = 988182660.

The previous prime is 1021123039. The next prime is 1021123073. The reversal of 1021123043 is 3403211201.

It is not a de Polignac number, because 1021123043 - 2² = 1021123039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021123013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 530321 + ... + 532242.

It is an arithmetic number, because the mean of its divisors is an integer number (175854342).

Almost surely, 2^1021123043 is an apocalyptic number.

1021123043 is a deficient number, since it is larger than the sum of its proper divisors (34003009).

1021123043 is an equidigital number, since it uses as much as digits as its factorization.

1021123043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062625 (or 1062594 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1021123043 is about 31955.0159286457. The cubic root of 1021123043 is about 1006.9920121570.

Adding to 1021123043 its reverse (3403211201), we get a palindrome (4424334244).

The spelling of 1021123043 in words is "one billion, twenty-one million, one hundred twenty-three thousand, forty-three".