21011041268654 has 16 divisors (see below), whose sum is σ = 32111484061392. Its totient is φ = 10307216582208.

The previous prime is 21011041268653. The next prime is 21011041268743. The reversal of 21011041268654 is 45686214011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011041268653) 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, 12891497 + ... + 14429579.

It is an arithmetic number, because the mean of its divisors is an integer number (2006967753837).

Almost surely, 2^{21011041268654} is an apocalyptic number.

21011041268654 is a deficient number, since it is larger than the sum of its proper divisors (11100442792738).

21011041268654 is a wasteful number, since it uses less digits than its factorization.

21011041268654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667011.

The product of its (nonzero) digits is 92160, while the sum is 41.

Adding to 21011041268654 its reverse (45686214011012), we get a palindrome (66697255279666).

The spelling of 21011041268654 in words is "twenty-one trillion, eleven billion, forty-one million, two hundred sixty-eight thousand, six hundred fifty-four".