1021423023253 has 16 divisors (see below), whose sum is σ = 1086145441920. Its totient is φ = 957843821376.

The previous prime is 1021423023223. The next prime is 1021423023259. The reversal of 1021423023253 is 3523203241201.

It is a happy number.

It is not a de Polignac number, because 1021423023253 - 2⁵ = 1021423023221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021423023259) 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, 133551 + ... + 1435507.

It is an arithmetic number, because the mean of its divisors is an integer number (67884090120).

Almost surely, 2^{1021423023253} is an apocalyptic number.

It is an amenable number.

1021423023253 is a deficient number, since it is larger than the sum of its proper divisors (64722418667).

1021423023253 is a wasteful number, since it uses less digits than its factorization.

1021423023253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302396.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 1021423023253 its reverse (3523203241201), we get a palindrome (4544626264454).

The spelling of 1021423023253 in words is "one trillion, twenty-one billion, four hundred twenty-three million, twenty-three thousand, two hundred fifty-three".