21010333221131 has 4 divisors (see below), whose sum is σ = 21012162922872. Its totient is φ = 21008503519392.

The previous prime is 21010333221079. The next prime is 21010333221161. The reversal of 21010333221131 is 13112233301012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010333221131 is a prime.

It is a super-2 number, since 2×21010333221131² (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 = 21010333221097 and 21010333221106.

It is not an unprimeable number, because it can be changed into a prime (21010333221161) 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, 914833646 + ... + 914856611.

It is an arithmetic number, because the mean of its divisors is an integer number (5253040730718).

Almost surely, 2^{21010333221131} is an apocalyptic number.

21010333221131 is a deficient number, since it is larger than the sum of its proper divisors (1829701741).

21010333221131 is a wasteful number, since it uses less digits than its factorization.

21010333221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829701740.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21010333221131 its reverse (13112233301012), we get a palindrome (34122566522143).

The spelling of 21010333221131 in words is "twenty-one trillion, ten billion, three hundred thirty-three million, two hundred twenty-one thousand, one hundred thirty-one".