21030303020131 has 4 divisors (see below), whose sum is σ = 22267379668392. Its totient is φ = 19793226371872.

The previous prime is 21030303020117. The next prime is 21030303020179. The reversal of 21030303020131 is 13102030303012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21030303020131 - 2¹⁵ = 21030302987363 is a prime.

It is a super-2 number, since 2×21030303020131² (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 = 21030303020099 and 21030303020108.

It is not an unprimeable number, because it can be changed into a prime (21030303020231) 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, 618538324105 + ... + 618538324138.

It is an arithmetic number, because the mean of its divisors is an integer number (5566844917098).

Almost surely, 2^{21030303020131} is an apocalyptic number.

21030303020131 is a deficient number, since it is larger than the sum of its proper divisors (1237076648261).

21030303020131 is a wasteful number, since it uses less digits than its factorization.

21030303020131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237076648260.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21030303020131 its reverse (13102030303012), we get a palindrome (34132333323143).

The spelling of 21030303020131 in words is "twenty-one trillion, thirty billion, three hundred three million, twenty thousand, one hundred thirty-one".