21261010041226 has 32 divisors (see below), whose sum is σ = 33122306973888. Its totient is φ = 10227671435520.

The previous prime is 21261010041203. The next prime is 21261010041247. The reversal of 21261010041226 is 62214001016212.

It is a super-2 number, since 2×21261010041226² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21261010041194 and 21261010041203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99766306 + ... + 99979186.

It is an arithmetic number, because the mean of its divisors is an integer number (1035072092934).

Almost surely, 2^{21261010041226} is an apocalyptic number.

21261010041226 is a deficient number, since it is larger than the sum of its proper divisors (11861296932662).

21261010041226 is a wasteful number, since it uses less digits than its factorization.

21261010041226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230326.

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 21261010041226 its reverse (62214001016212), we get a palindrome (83475011057438).

The spelling of 21261010041226 in words is "twenty-one trillion, two hundred sixty-one billion, ten million, forty-one thousand, two hundred twenty-six".