21210101102219 has 4 divisors (see below), whose sum is σ = 21894297912000. Its totient is φ = 20525904292440.

The previous prime is 21210101102131. The next prime is 21210101102231. The reversal of 21210101102219 is 91220110101212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210101102219 is a prime.

It is a super-2 number, since 2×21210101102219² (a number of 27 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 = 21210101102194 and 21210101102203.

It is not an unprimeable number, because it can be changed into a prime (21210101102249) 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, 342098404844 + ... + 342098404905.

It is an arithmetic number, because the mean of its divisors is an integer number (5473574478000).

Almost surely, 2^{21210101102219} is an apocalyptic number.

21210101102219 is a deficient number, since it is larger than the sum of its proper divisors (684196809781).

21210101102219 is an equidigital number, since it uses as much as digits as its factorization.

21210101102219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684196809780.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 21210101102219 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, one hundred two thousand, two hundred nineteen".