21101102197 has 16 divisors (see below), whose sum is σ = 24446103552. Its totient is φ = 17840390400.

The previous prime is 21101102173. The next prime is 21101102203. The reversal of 21101102197 is 79120110112.

It is not a de Polignac number, because 21101102197 - 2¹¹ = 21101100149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101102597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85197 + ... + 222397.

It is an arithmetic number, because the mean of its divisors is an integer number (1527881472).

Almost surely, 2^21101102197 is an apocalyptic number.

It is an amenable number.

21101102197 is a deficient number, since it is larger than the sum of its proper divisors (3345001355).

21101102197 is a wasteful number, since it uses less digits than its factorization.

21101102197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137508.

The product of its (nonzero) digits is 252, while the sum is 25.

The spelling of 21101102197 in words is "twenty-one billion, one hundred one million, one hundred two thousand, one hundred ninety-seven".