21123011210331 has 8 divisors (see below), whose sum is σ = 28695411455760. Its totient is φ = 13816309219232.

The previous prime is 21123011210321. The next prime is 21123011210363. The reversal of 21123011210331 is 13301211032112.

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 21123011210331 - 2⁶ = 21123011210267 is a prime.

It is a super-3 number, since 3×21123011210331³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21123011210298 and 21123011210307.

It is not an unprimeable number, because it can be changed into a prime (21123011210311) 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, 66424563396 + ... + 66424563713.

It is an arithmetic number, because the mean of its divisors is an integer number (3586926431970).

Almost surely, 2^{21123011210331} is an apocalyptic number.

21123011210331 is a deficient number, since it is larger than the sum of its proper divisors (7572400245429).

21123011210331 is a wasteful number, since it uses less digits than its factorization.

21123011210331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132849127165.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21123011210331 its reverse (13301211032112), we get a palindrome (34424222242443).

The spelling of 21123011210331 in words is "twenty-one trillion, one hundred twenty-three billion, eleven million, two hundred ten thousand, three hundred thirty-one".