21101220092 has 6 divisors (see below), whose sum is σ = 36927135168. Its totient is φ = 10550610044.

The previous prime is 21101220083. The next prime is 21101220103. The reversal of 21101220092 is 29002210112.

It is a happy number.

It is a super-2 number, since 2×21101220092² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2637652508 + ... + 2637652515.

It is an arithmetic number, because the mean of its divisors is an integer number (6154522528).

Almost surely, 2^21101220092 is an apocalyptic number.

It is an amenable number.

21101220092 is a deficient number, since it is larger than the sum of its proper divisors (15825915076).

21101220092 is a wasteful number, since it uses less digits than its factorization.

21101220092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5275305027 (or 5275305025 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 21101220092 in words is "twenty-one billion, one hundred one million, two hundred twenty thousand, ninety-two".