21226401013154 has 16 divisors (see below), whose sum is σ = 31945022339256. Its totient is φ = 10578070675200.

The previous prime is 21226401013099. The next prime is 21226401013159. The reversal of 21226401013154 is 45131010462212.

It can be written as a sum of positive squares in 4 ways, for example, as 10024360180129 + 11202040833025 = 3166127^2 + 3346945^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21226401013154.

It is not an unprimeable number, because it can be changed into a prime (21226401013159) 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, 1463834 + ... + 6677994.

Almost surely, 2^{21226401013154} is an apocalyptic number.

21226401013154 is a deficient number, since it is larger than the sum of its proper divisors (10718621326102).

21226401013154 is a wasteful number, since it uses less digits than its factorization.

21226401013154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5220901.

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 21226401013154 its reverse (45131010462212), we get a palindrome (66357411475366).

The spelling of 21226401013154 in words is "twenty-one trillion, two hundred twenty-six billion, four hundred one million, thirteen thousand, one hundred fifty-four".