1220211101121 has 8 divisors (see below), whose sum is σ = 1628302800864. Its totient is φ = 812796734400.

The previous prime is 1220211101077. The next prime is 1220211101141. The reversal of 1220211101121 is 1211011120221.

It is a happy number.

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

It is not a de Polignac number, because 1220211101121 - 2⁹ = 1220211100609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220211101121.

It is not an unprimeable number, because it can be changed into a prime (1220211101141) 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, 169329051 + ... + 169336256.

It is an arithmetic number, because the mean of its divisors is an integer number (203537850108).

Almost surely, 2^{1220211101121} is an apocalyptic number.

It is an amenable number.

1220211101121 is a deficient number, since it is larger than the sum of its proper divisors (408091699743).

1220211101121 is a wasteful number, since it uses less digits than its factorization.

1220211101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338666511.

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

Adding to 1220211101121 its reverse (1211011120221), we get a palindrome (2431222221342).

The spelling of 1220211101121 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred one thousand, one hundred twenty-one".