21030031023133 has 4 divisors (see below), whose sum is σ = 22941852025248. Its totient is φ = 19118210021020.

The previous prime is 21030031023109. The next prime is 21030031023143. The reversal of 21030031023133 is 33132013003012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21030031023133 - 2¹⁷ = 21030030892061 is a prime.

It is a super-2 number, since 2×21030031023133² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030031023143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 955910501041 + ... + 955910501062.

It is an arithmetic number, because the mean of its divisors is an integer number (5735463006312).

Almost surely, 2^{21030031023133} is an apocalyptic number.

It is an amenable number.

21030031023133 is a deficient number, since it is larger than the sum of its proper divisors (1911821002115).

21030031023133 is a wasteful number, since it uses less digits than its factorization.

21030031023133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911821002114.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21030031023133 its reverse (33132013003012), we get a palindrome (54162044026145).

The spelling of 21030031023133 in words is "twenty-one trillion, thirty billion, thirty-one million, twenty-three thousand, one hundred thirty-three".