1200231011221 has 8 divisors (see below), whose sum is σ = 1354492677600. Its totient is φ = 1053494304240.

The previous prime is 1200231011143. The next prime is 1200231011267. The reversal of 1200231011221 is 1221101320021.

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 1200231011221 - 2⁹ = 1200231010709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200231011195 and 1200231011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200231011521) 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, 1881239511 + ... + 1881240148.

It is an arithmetic number, because the mean of its divisors is an integer number (169311584700).

Almost surely, 2^{1200231011221} is an apocalyptic number.

1200231011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200231011221 is a deficient number, since it is larger than the sum of its proper divisors (154261666379).

1200231011221 is a wasteful number, since it uses less digits than its factorization.

1200231011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3762479699.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1200231011221 its reverse (1221101320021), we get a palindrome (2421332331242).

The spelling of 1200231011221 in words is "one trillion, two hundred billion, two hundred thirty-one million, eleven thousand, two hundred twenty-one".