1211130020221 has 8 divisors (see below), whose sum is σ = 1321294377600. Its totient is φ = 1100975934240.

The previous prime is 1211130020213. The next prime is 1211130020279. The reversal of 1211130020221 is 1220200311121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211130020221 - 2³ = 1211130020213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211130020195 and 1211130020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211130020281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2320261 + ... + 2793898.

It is an arithmetic number, because the mean of its divisors is an integer number (165161797200).

Almost surely, 2^{1211130020221} is an apocalyptic number.

1211130020221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211130020221 is a deficient number, since it is larger than the sum of its proper divisors (110164357379).

1211130020221 is a wasteful number, since it uses less digits than its factorization.

1211130020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135699.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1211130020221 its reverse (1220200311121), we get a palindrome (2431330331342).

The spelling of 1211130020221 in words is "one trillion, two hundred eleven billion, one hundred thirty million, twenty thousand, two hundred twenty-one".