21612033431141 has 4 divisors (see below), whose sum is σ = 21612085401984. Its totient is φ = 21611981460300.

The previous prime is 21612033431137. The next prime is 21612033431171. The reversal of 21612033431141 is 14113433021612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21612033431141 - 2² = 21612033431137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21612033431098 and 21612033431107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21612033431171) 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, 25356575 + ... + 26195036.

It is an arithmetic number, because the mean of its divisors is an integer number (5403021350496).

Almost surely, 2^{21612033431141} is an apocalyptic number.

It is an amenable number.

21612033431141 is a deficient number, since it is larger than the sum of its proper divisors (51970843).

21612033431141 is an equidigital number, since it uses as much as digits as its factorization.

21612033431141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51970842.

The product of its (nonzero) digits is 10368, while the sum is 32.

Adding to 21612033431141 its reverse (14113433021612), we get a palindrome (35725466452753).

The spelling of 21612033431141 in words is "twenty-one trillion, six hundred twelve billion, thirty-three million, four hundred thirty-one thousand, one hundred forty-one".