21101101026 has 16 divisors (see below), whose sum is σ = 42796600128. Its totient is φ = 6934634000.

The previous prime is 21101101009. The next prime is 21101101027. The reversal of 21101101026 is 62010110112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21101100996 and 21101101014.

It is not an unprimeable number, because it can be changed into a prime (21101101027) 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, 24766125 + ... + 24766976.

It is an arithmetic number, because the mean of its divisors is an integer number (2674787508).

Almost surely, 2^21101101026 is an apocalyptic number.

21101101026 is an abundant number, since it is smaller than the sum of its proper divisors (21695499102).

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

21101101026 is a wasteful number, since it uses less digits than its factorization.

21101101026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49533177.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21101101026 its reverse (62010110112), we get a palindrome (83111211138).

The spelling of 21101101026 in words is "twenty-one billion, one hundred one million, one hundred one thousand, twenty-six".