21016451226 has 8 divisors (see below), whose sum is σ = 42032902464. Its totient is φ = 7005483740.

The previous prime is 21016451213. The next prime is 21016451257. The reversal of 21016451226 is 62215461012.

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

21016451226 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21016451193 and 21016451202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1751370930 + ... + 1751370941.

It is an arithmetic number, because the mean of its divisors is an integer number (5254112808).

Almost surely, 2^21016451226 is an apocalyptic number.

21016451226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21016451226 is a wasteful number, since it uses less digits than its factorization.

21016451226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502741876.

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 21016451226 in words is "twenty-one billion, sixteen million, four hundred fifty-one thousand, two hundred twenty-six".