10111220120221 has 4 divisors (see below), whose sum is σ = 11030421949344. Its totient is φ = 9192018291100.

The previous prime is 10111220120129. The next prime is 10111220120233. The reversal of 10111220120221 is 12202102211101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10111220120221 - 2⁹ = 10111220119709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10111220120195 and 10111220120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111220120621) 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, 459600914545 + ... + 459600914566.

It is an arithmetic number, because the mean of its divisors is an integer number (2757605487336).

Almost surely, 2^{10111220120221} is an apocalyptic number.

10111220120221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10111220120221 is a deficient number, since it is larger than the sum of its proper divisors (919201829123).

10111220120221 is an equidigital number, since it uses as much as digits as its factorization.

10111220120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919201829122.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10111220120221 its reverse (12202102211101), we get a palindrome (22313322331322).

The spelling of 10111220120221 in words is "ten trillion, one hundred eleven billion, two hundred twenty million, one hundred twenty thousand, two hundred twenty-one".