1200120120221 has 12 divisors (see below), whose sum is σ = 1347207118656. Its totient is φ = 1067805130920.

The previous prime is 1200120120217. The next prime is 1200120120253. The reversal of 1200120120221 is 1220210210021.

It is not a de Polignac number, because 1200120120221 - 2² = 1200120120217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200120120196 and 1200120120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200120140221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105508655 + ... + 105520028.

It is an arithmetic number, because the mean of its divisors is an integer number (112267259888).

Almost surely, 2^{1200120120221} is an apocalyptic number.

1200120120221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200120120221 is a deficient number, since it is larger than the sum of its proper divisors (147086998435).

1200120120221 is a wasteful number, since it uses less digits than its factorization.

1200120120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211028752 (or 211028741 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1200120120221 its reverse (1220210210021), we get a palindrome (2420330330242).

The spelling of 1200120120221 in words is "one trillion, two hundred billion, one hundred twenty million, one hundred twenty thousand, two hundred twenty-one".