1201021220011 has 4 divisors (see below), whose sum is σ = 1201127413024. Its totient is φ = 1200915027000.

The previous prime is 1201021219973. The next prime is 1201021220029. The reversal of 1201021220011 is 1100221201021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201021220011 - 2⁹ = 1201021219499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201021219973 and 1201021220000.

It is not an unprimeable number, because it can be changed into a prime (1201021220081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53079540 + ... + 53102161.

It is an arithmetic number, because the mean of its divisors is an integer number (300281853256).

Almost surely, 2^{1201021220011} is an apocalyptic number.

1201021220011 is a deficient number, since it is larger than the sum of its proper divisors (106193013).

1201021220011 is a wasteful number, since it uses less digits than its factorization.

1201021220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106193012.

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

Adding to 1201021220011 its reverse (1100221201021), we get a palindrome (2301242421032).

The spelling of 1201021220011 in words is "one trillion, two hundred one billion, twenty-one million, two hundred twenty thousand, eleven".