221212200100019 has 4 divisors (see below), whose sum is σ = 221696253054744. Its totient is φ = 220728147145296.

The previous prime is 221212200100009. The next prime is 221212200100037. The reversal of 221212200100019 is 910001002212122.

221212200100019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221212200100019 - 2³⁶ = 221143480623283 is a prime.

It is a super-2 number, since 2×221212200100019² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221212200099967 and 221212200100003.

It is not an unprimeable number, because it can be changed into a prime (221212200100009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242026476677 + ... + 242026477590.

It is an arithmetic number, because the mean of its divisors is an integer number (55424063263686).

Almost surely, 2^{221212200100019} is an apocalyptic number.

221212200100019 is a deficient number, since it is larger than the sum of its proper divisors (484052954725).

221212200100019 is an equidigital number, since it uses as much as digits as its factorization.

221212200100019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484052954724.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 221212200100019 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred million, one hundred thousand, nineteen".