21230311333031 has 8 divisors (see below), whose sum is σ = 21966255781680. Its totient is φ = 20494624534272.

The previous prime is 21230311333003. The next prime is 21230311333037. The reversal of 21230311333031 is 13033311303212.

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 21230311333031 - 2³⁰ = 21229237591207 is a prime.

It is a super-2 number, since 2×21230311333031² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230311333037) 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, 64244810 + ... + 64574423.

It is an arithmetic number, because the mean of its divisors is an integer number (2745781972710).

Almost surely, 2^{21230311333031} is an apocalyptic number.

21230311333031 is a deficient number, since it is larger than the sum of its proper divisors (735944448649).

21230311333031 is a wasteful number, since it uses less digits than its factorization.

21230311333031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128824945.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 21230311333031 its reverse (13033311303212), we get a palindrome (34263622636243).

The spelling of 21230311333031 in words is "twenty-one trillion, two hundred thirty billion, three hundred eleven million, three hundred thirty-three thousand, thirty-one".