1020201232123 has 4 divisors (see below), whose sum is σ = 1020266641048. Its totient is φ = 1020135823200.

The previous prime is 1020201232109. The next prime is 1020201232139. The reversal of 1020201232123 is 3212321020201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020201232123 - 2⁹ = 1020201231611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020201232123.

It is not an unprimeable number, because it can be changed into a prime (1020201232163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32681061 + ... + 32712262.

It is an arithmetic number, because the mean of its divisors is an integer number (255066660262).

Almost surely, 2^{1020201232123} is an apocalyptic number.

1020201232123 is a deficient number, since it is larger than the sum of its proper divisors (65408925).

1020201232123 is an equidigital number, since it uses as much as digits as its factorization.

1020201232123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65408924.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1020201232123 its reverse (3212321020201), we get a palindrome (4232522252324).

The spelling of 1020201232123 in words is "one trillion, twenty billion, two hundred one million, two hundred thirty-two thousand, one hundred twenty-three".