1201111110221 has 12 divisors (see below), whose sum is σ = 1320262578432. Its totient is φ = 1091891889000.

The previous prime is 1201111110211. The next prime is 1201111110233. The reversal of 1201111110221 is 1220111111021.

It is not a de Polignac number, because 1201111110221 - 2³⁸ = 926233203277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201111110196 and 1201111110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201111110211) 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, 5964386 + ... + 6162476.

It is an arithmetic number, because the mean of its divisors is an integer number (110021881536).

Almost surely, 2^{1201111110221} is an apocalyptic number.

1201111110221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201111110221 is a deficient number, since it is larger than the sum of its proper divisors (119151468211).

1201111110221 is a wasteful number, since it uses less digits than its factorization.

1201111110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248224 (or 248213 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1201111110221 its reverse (1220111111021), we get a palindrome (2421222221242).

The spelling of 1201111110221 in words is "one trillion, two hundred one billion, one hundred eleven million, one hundred ten thousand, two hundred twenty-one".