21101036154 has 32 divisors (see below), whose sum is σ = 46044863424. Its totient is φ = 6393386880.

The previous prime is 21101036149. The next prime is 21101036161. The reversal of 21101036154 is 45163010112.

It is a happy number.

It is a super-2 number, since 2×21101036154² (a number of 21 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 605632 + ... + 639524.

It is an arithmetic number, because the mean of its divisors is an integer number (1438901982).

Almost surely, 2^21101036154 is an apocalyptic number.

21101036154 is an abundant number, since it is smaller than the sum of its proper divisors (24943827270).

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

21101036154 is a wasteful number, since it uses less digits than its factorization.

21101036154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43342.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 21101036154 its reverse (45163010112), we get a palindrome (66264046266).

The spelling of 21101036154 in words is "twenty-one billion, one hundred one million, thirty-six thousand, one hundred fifty-four".