21612635130226 has 16 divisors (see below), whose sum is σ = 37130600928960. Its totient is φ = 9242465593680.

The previous prime is 21612635130197. The next prime is 21612635130227. The reversal of 21612635130226 is 62203153621612.

It is a super-2 number, since 2×21612635130226² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21612635130227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1674353256 + ... + 1674366163.

It is an arithmetic number, because the mean of its divisors is an integer number (2320662558060).

Almost surely, 2^{21612635130226} is an apocalyptic number.

21612635130226 is a deficient number, since it is larger than the sum of its proper divisors (15517965798734).

21612635130226 is a wasteful number, since it uses less digits than its factorization.

21612635130226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3348719889.

The product of its (nonzero) digits is 155520, while the sum is 40.

Adding to 21612635130226 its reverse (62203153621612), we get a palindrome (83815788751838).

The spelling of 21612635130226 in words is "twenty-one trillion, six hundred twelve billion, six hundred thirty-five million, one hundred thirty thousand, two hundred twenty-six".