21111302030331 has 4 divisors (see below), whose sum is σ = 28148402707112. Its totient is φ = 14074201353552.

The previous prime is 21111302030263. The next prime is 21111302030339. The reversal of 21111302030331 is 13303020311112.

It is a happy number.

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

It is not a de Polignac number, because 21111302030331 - 2⁹ = 21111302029819 is a prime.

It is a super-2 number, since 2×21111302030331² (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 = 21111302030298 and 21111302030307.

It is not an unprimeable number, because it can be changed into a prime (21111302030339) 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, 3518550338386 + ... + 3518550338391.

It is an arithmetic number, because the mean of its divisors is an integer number (7037100676778).

Almost surely, 2^{21111302030331} is an apocalyptic number.

21111302030331 is a deficient number, since it is larger than the sum of its proper divisors (7037100676781).

21111302030331 is an equidigital number, since it uses as much as digits as its factorization.

21111302030331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7037100676780.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21111302030331 its reverse (13303020311112), we get a palindrome (34414322341443).

The spelling of 21111302030331 in words is "twenty-one trillion, one hundred eleven billion, three hundred two million, thirty thousand, three hundred thirty-one".