1201221101211 has 32 divisors (see below), whose sum is σ = 1670414008320. Its totient is φ = 766997229600.

The previous prime is 1201221101203. The next prime is 1201221101233. The reversal of 1201221101211 is 1121011221021.

It is a happy number.

It is not a de Polignac number, because 1201221101211 - 2³ = 1201221101203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201221101411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3341526 + ... + 3683508.

It is an arithmetic number, because the mean of its divisors is an integer number (52200437760).

Almost surely, 2^{1201221101211} is an apocalyptic number.

1201221101211 is a deficient number, since it is larger than the sum of its proper divisors (469192907109).

1201221101211 is a wasteful number, since it uses less digits than its factorization.

1201221101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342407.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1201221101211 its reverse (1121011221021), we get a palindrome (2322232322232).

The spelling of 1201221101211 in words is "one trillion, two hundred one billion, two hundred twenty-one million, one hundred one thousand, two hundred eleven".