21021101120219 has 4 divisors (see below), whose sum is σ = 21023628614544. Its totient is φ = 21018573625896.

The previous prime is 21021101120183. The next prime is 21021101120263. The reversal of 21021101120219 is 91202110112012.

It is a happy number.

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 21021101120219 - 2⁴⁰ = 19921589492443 is a prime.

It is a super-2 number, since 2×21021101120219² (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 = 21021101120194 and 21021101120203.

It is not an unprimeable number, because it can be changed into a prime (21021101120519) 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, 1263734687 + ... + 1263751320.

It is an arithmetic number, because the mean of its divisors is an integer number (5255907153636).

Almost surely, 2^{21021101120219} is an apocalyptic number.

21021101120219 is a deficient number, since it is larger than the sum of its proper divisors (2527494325).

21021101120219 is an equidigital number, since it uses as much as digits as its factorization.

21021101120219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527494324.

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

The spelling of 21021101120219 in words is "twenty-one trillion, twenty-one billion, one hundred one million, one hundred twenty thousand, two hundred nineteen".