20030123131221 has 8 divisors (see below), whose sum is σ = 30522092390464. Its totient is φ = 11445784646400.

The previous prime is 20030123131199. The next prime is 20030123131237. The reversal of 20030123131221 is 12213132103002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20030123131221 - 2¹⁹ = 20030122606933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 953815387201 = 20030123131221 / (2 + 0 + 0 + 3 + 0 + 1 + 2 + 3 + 1 + 3 + 1 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030123131241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476907693580 + ... + 476907693621.

It is an arithmetic number, because the mean of its divisors is an integer number (3815261548808).

Almost surely, 2^{20030123131221} is an apocalyptic number.

20030123131221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20030123131221 is a deficient number, since it is larger than the sum of its proper divisors (10491969259243).

20030123131221 is an equidigital number, since it uses as much as digits as its factorization.

20030123131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953815387211.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 20030123131221 its reverse (12213132103002), we get a palindrome (32243255234223).

The spelling of 20030123131221 in words is "twenty trillion, thirty billion, one hundred twenty-three million, one hundred thirty-one thousand, two hundred twenty-one".