21103020231331 has 8 divisors (see below), whose sum is σ = 21435501671424. Its totient is φ = 20771518119240.

The previous prime is 21103020231253. The next prime is 21103020231343. The reversal of 21103020231331 is 13313202030112.

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

It is a cyclic number.

It is not a de Polignac number, because 21103020231331 - 2⁷ = 21103020231203 is a prime.

It is a super-2 number, since 2×21103020231331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103020231431) 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, 244788565 + ... + 244874758.

It is an arithmetic number, because the mean of its divisors is an integer number (2679437708928).

Almost surely, 2^{21103020231331} is an apocalyptic number.

21103020231331 is a deficient number, since it is larger than the sum of its proper divisors (332481440093).

21103020231331 is an equidigital number, since it uses as much as digits as its factorization.

21103020231331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489664001.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21103020231331 its reverse (13313202030112), we get a palindrome (34416222261443).

The spelling of 21103020231331 in words is "twenty-one trillion, one hundred three billion, twenty million, two hundred thirty-one thousand, three hundred thirty-one".