1200000020221 has 8 divisors (see below), whose sum is σ = 1217981366784. Its totient is φ = 1182020759040.

The previous prime is 1200000020171. The next prime is 1200000020243. The reversal of 1200000020221 is 1220200000021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200000020221 - 2²³ = 1199991631613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200000020198 and 1200000020207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200000020251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657981 + ... + 1683133.

It is an arithmetic number, because the mean of its divisors is an integer number (152247670848).

Almost surely, 2^{1200000020221} is an apocalyptic number.

It is an amenable number.

1200000020221 is a deficient number, since it is larger than the sum of its proper divisors (17981346563).

1200000020221 is a wasteful number, since it uses less digits than its factorization.

1200000020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042691.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1200000020221 its reverse (1220200000021), we get a palindrome (2420200020242).

The spelling of 1200000020221 in words is "one trillion, two hundred billion, twenty thousand, two hundred twenty-one".