1023000203021 has 2 divisors, whose sum is σ = 1023000203022. Its totient is φ = 1023000203020.

The previous prime is 1023000202951. The next prime is 1023000203047. The reversal of 1023000203021 is 1203020003201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 915638472100 + 107361730921 = 956890^2 + 327661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023000203021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1023000202987 and 1023000203005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023000203921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511500101510 + 511500101511.

It is an arithmetic number, because the mean of its divisors is an integer number (511500101511).

Almost surely, 2^{1023000203021} is an apocalyptic number.

It is an amenable number.

1023000203021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023000203021 is an equidigital number, since it uses as much as digits as its factorization.

1023000203021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 1023000203021 its reverse (1203020003201), we get a palindrome (2226020206222).

The spelling of 1023000203021 in words is "one trillion, twenty-three billion, two hundred three thousand, twenty-one".