20021211219 has 16 divisors (see below), whose sum is σ = 28282355712. Its totient is φ = 12554721408.

The previous prime is 20021211211. The next prime is 20021211239. The reversal of 20021211219 is 91211212002.

It is not a de Polignac number, because 20021211219 - 2³ = 20021211211 is a prime.

It is a super-2 number, since 2×20021211219² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20021211195 and 20021211204.

It is not an unprimeable number, because it can be changed into a prime (20021211211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33219 + ... + 202844.

It is an arithmetic number, because the mean of its divisors is an integer number (1767647232).

Almost surely, 2^20021211219 is an apocalyptic number.

20021211219 is a deficient number, since it is larger than the sum of its proper divisors (8261144493).

20021211219 is a wasteful number, since it uses less digits than its factorization.

20021211219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237746.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 20021211219 in words is "twenty billion, twenty-one million, two hundred eleven thousand, two hundred nineteen".