1023200021523 has 16 divisors (see below), whose sum is σ = 1383498583200. Its totient is φ = 672524745984.

The previous prime is 1023200021521. The next prime is 1023200021581. The reversal of 1023200021523 is 3251200023201.

It is not a de Polignac number, because 1023200021523 - 2¹ = 1023200021521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1023200021523.

It is not an unprimeable number, because it can be changed into a prime (1023200021521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358236 + ... + 1474697.

It is an arithmetic number, because the mean of its divisors is an integer number (86468661450).

Almost surely, 2^{1023200021523} is an apocalyptic number.

1023200021523 is a deficient number, since it is larger than the sum of its proper divisors (360298561677).

1023200021523 is a wasteful number, since it uses less digits than its factorization.

1023200021523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835558.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 1023200021523 its reverse (3251200023201), we get a palindrome (4274400044724).

The spelling of 1023200021523 in words is "one trillion, twenty-three billion, two hundred million, twenty-one thousand, five hundred twenty-three".