1020203045122 has 4 divisors (see below), whose sum is σ = 1530304567686. Its totient is φ = 510101522560.

The previous prime is 1020203045087. The next prime is 1020203045123. The reversal of 1020203045122 is 2215403020201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 520751300161 + 499451744961 = 721631^2 + 706719^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1020203045093 and 1020203045102.

It is not an unprimeable number, because it can be changed into a prime (1020203045123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255050761279 + ... + 255050761282.

Almost surely, 2^{1020203045122} is an apocalyptic number.

1020203045122 is a deficient number, since it is larger than the sum of its proper divisors (510101522564).

1020203045122 is an equidigital number, since it uses as much as digits as its factorization.

1020203045122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510101522563.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 1020203045122 its reverse (2215403020201), we get a palindrome (3235606065323).

The spelling of 1020203045122 in words is "one trillion, twenty billion, two hundred three million, forty-five thousand, one hundred twenty-two".