21200212190 has 16 divisors (see below), whose sum is σ = 38262695328. Its totient is φ = 8457348576.

The previous prime is 21200212133. The next prime is 21200212193. The reversal of 21200212190 is 9121200212.

It is a happy number.

It is a super-2 number, since 2×21200212190² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200212193) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2838122 + ... + 2845581.

It is an arithmetic number, because the mean of its divisors is an integer number (2391418458).

Almost surely, 2^21200212190 is an apocalyptic number.

21200212190 is a deficient number, since it is larger than the sum of its proper divisors (17062483138).

21200212190 is a wasteful number, since it uses less digits than its factorization.

21200212190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5684083.

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

The spelling of 21200212190 in words is "twenty-one billion, two hundred million, two hundred twelve thousand, one hundred ninety".