12021020219 has 16 divisors (see below), whose sum is σ = 13589517312. Its totient is φ = 10550277408.

The previous prime is 12021020197. The next prime is 12021020239. The reversal of 12021020219 is 91202012021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12021020219 - 2¹² = 12021016123 is a prime.

It is a super-2 number, since 2×12021020219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12021020219.

It is not an unprimeable number, because it can be changed into a prime (12021020239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70439 + ... + 170304.

It is an arithmetic number, because the mean of its divisors is an integer number (849344832).

Almost surely, 2^12021020219 is an apocalyptic number.

12021020219 is a deficient number, since it is larger than the sum of its proper divisors (1568497093).

12021020219 is a wasteful number, since it uses less digits than its factorization.

12021020219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240946.

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

The spelling of 12021020219 in words is "twelve billion, twenty-one million, twenty thousand, two hundred nineteen".