1200012101221 has 16 divisors (see below), whose sum is σ = 1215055520640. Its totient is φ = 1185049707520.

The previous prime is 1200012101207. The next prime is 1200012101251. The reversal of 1200012101221 is 1221012100021.

It is a cyclic number.

It is not a de Polignac number, because 1200012101221 - 2¹¹ = 1200012099173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200012101251) 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, 99062061 + ... + 99074173.

It is an arithmetic number, because the mean of its divisors is an integer number (75940970040).

Almost surely, 2^{1200012101221} is an apocalyptic number.

It is an amenable number.

1200012101221 is a deficient number, since it is larger than the sum of its proper divisors (15043419419).

1200012101221 is a wasteful number, since it uses less digits than its factorization.

1200012101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15356.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1200012101221 its reverse (1221012100021), we get a palindrome (2421024201242).

It can be divided in two parts, 120001 and 2101221, that added together give a palindrome (2221222).

The spelling of 1200012101221 in words is "one trillion, two hundred billion, twelve million, one hundred one thousand, two hundred twenty-one".