1020421243323 has 24 divisors (see below), whose sum is σ = 1569362979600. Its totient is φ = 636687396864.

The previous prime is 1020421243279. The next prime is 1020421243399. The reversal of 1020421243323 is 3233421240201.

1020421243323 is a `hidden beast` number, since 1 + 0 + 204 + 2 + 1 + 2 + 433 + 23 = 666.

It is not a de Polignac number, because 1020421243323 - 2¹³ = 1020421235131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020421243823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18602278 + ... + 18657051.

It is an arithmetic number, because the mean of its divisors is an integer number (65390124150).

Almost surely, 2^{1020421243323} is an apocalyptic number.

1020421243323 is a deficient number, since it is larger than the sum of its proper divisors (548941736277).

1020421243323 is a wasteful number, since it uses less digits than its factorization.

1020421243323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37259531 (or 37259528 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 1020421243323 its reverse (3233421240201), we get a palindrome (4253842483524).

The spelling of 1020421243323 in words is "one trillion, twenty billion, four hundred twenty-one million, two hundred forty-three thousand, three hundred twenty-three".