21201100010190 has 48 divisors (see below), whose sum is σ = 55196259483456. Its totient is φ = 5646098520000.

The previous prime is 21201100010117. The next prime is 21201100010191. The reversal of 21201100010190 is 9101000110212.

It is a happy number.

It is a super-2 number, since 2×21201100010190² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201100010191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156768481 + ... + 156903660.

It is an arithmetic number, because the mean of its divisors is an integer number (1149922072572).

Almost surely, 2^{21201100010190} is an apocalyptic number.

21201100010190 is an abundant number, since it is smaller than the sum of its proper divisors (33995159473266).

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

21201100010190 is a wasteful number, since it uses less digits than its factorization.

21201100010190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313672905 (or 313672902 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 21201100010190 in words is "twenty-one trillion, two hundred one billion, one hundred million, ten thousand, one hundred ninety".