1201221200011 has 32 divisors (see below), whose sum is σ = 1387415817216. Its totient is φ = 1018726800000.

The previous prime is 1201221199991. The next prime is 1201221200017. The reversal of 1201221200011 is 1100021221021.

It is not a de Polignac number, because 1201221200011 - 2⁷ = 1201221199883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201221199964 and 1201221200000.

It is not an unprimeable number, because it can be changed into a prime (1201221200017) 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, 631888161 + ... + 631890061.

It is an arithmetic number, because the mean of its divisors is an integer number (43356744288).

Almost surely, 2^{1201221200011} is an apocalyptic number.

1201221200011 is a deficient number, since it is larger than the sum of its proper divisors (186194617205).

1201221200011 is a wasteful number, since it uses less digits than its factorization.

1201221200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3723.

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

Adding to 1201221200011 its reverse (1100021221021), we get a palindrome (2301242421032).

The spelling of 1201221200011 in words is "one trillion, two hundred one billion, two hundred twenty-one million, two hundred thousand, eleven".