21112445451331 has 8 divisors (see below), whose sum is σ = 22738883028624. Its totient is φ = 19486351204320.

The previous prime is 21112445451311. The next prime is 21112445451347. The reversal of 21112445451331 is 13315454421112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21112445451331 - 2¹⁵ = 21112445418563 is a prime.

It is a super-2 number, since 2×21112445451331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112445451311) 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, 85704841 + ... + 85950826.

It is an arithmetic number, because the mean of its divisors is an integer number (2842360378578).

Almost surely, 2^{21112445451331} is an apocalyptic number.

21112445451331 is a deficient number, since it is larger than the sum of its proper divisors (1626437577293).

21112445451331 is a wasteful number, since it uses less digits than its factorization.

21112445451331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171665141.

The product of its digits is 57600, while the sum is 37.

Adding to 21112445451331 its reverse (13315454421112), we get a palindrome (34427899872443).

The spelling of 21112445451331 in words is "twenty-one trillion, one hundred twelve billion, four hundred forty-five million, four hundred fifty-one thousand, three hundred thirty-one".