21013034034031 has 16 divisors (see below), whose sum is σ = 23020173177120. Its totient is φ = 19062263445120.

The previous prime is 21013034034029. The next prime is 21013034034067. The reversal of 21013034034031 is 13043043031012.

It is a cyclic number.

It is not a de Polignac number, because 21013034034031 - 2¹ = 21013034034029 is a prime.

It is a super-2 number, since 2×21013034034031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21013034033987 and 21013034034005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013034034071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10469896 + ... + 12314413.

It is an arithmetic number, because the mean of its divisors is an integer number (1438760823570).

Almost surely, 2^{21013034034031} is an apocalyptic number.

21013034034031 is a deficient number, since it is larger than the sum of its proper divisors (2007139143089).

21013034034031 is a wasteful number, since it uses less digits than its factorization.

21013034034031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22785546.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21013034034031 its reverse (13043043031012), we get a palindrome (34056077065043).

The spelling of 21013034034031 in words is "twenty-one trillion, thirteen billion, thirty-four million, thirty-four thousand, thirty-one".