21020313201031 has 8 divisors (see below), whose sum is σ = 21026669567904. Its totient is φ = 21013957596960.

The previous prime is 21020313201029. The next prime is 21020313201049. The reversal of 21020313201031 is 13010231302012.

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 21020313201031 - 2¹ = 21020313201029 is a prime.

It is a super-2 number, since 2×21020313201031² (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 (21020313201011) 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, 57549726 + ... + 57913828.

It is an arithmetic number, because the mean of its divisors is an integer number (2628333695988).

Almost surely, 2^{21020313201031} is an apocalyptic number.

21020313201031 is a deficient number, since it is larger than the sum of its proper divisors (6356366873).

21020313201031 is a wasteful number, since it uses less digits than its factorization.

21020313201031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381401.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21020313201031 its reverse (13010231302012), we get a palindrome (34030544503043).

The spelling of 21020313201031 in words is "twenty-one trillion, twenty billion, three hundred thirteen million, two hundred one thousand, thirty-one".