1201001020221 has 16 divisors (see below), whose sum is σ = 1644734415104. Its totient is φ = 778970654784.

The previous prime is 1201001020201. The next prime is 1201001020231. The reversal of 1201001020221 is 1220201001021.

It is not a de Polignac number, because 1201001020221 - 2³⁰ = 1199927278397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201001020197 and 1201001020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201001020201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1154115 + ... + 1932351.

It is an arithmetic number, because the mean of its divisors is an integer number (102795900944).

Almost surely, 2^{1201001020221} is an apocalyptic number.

It is an amenable number.

1201001020221 is a deficient number, since it is larger than the sum of its proper divisors (443733394883).

1201001020221 is a wasteful number, since it uses less digits than its factorization.

1201001020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792180.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1201001020221 its reverse (1220201001021), we get a palindrome (2421202021242).

The spelling of 1201001020221 in words is "one trillion, two hundred one billion, one million, twenty thousand, two hundred twenty-one".