10101120221 has 4 divisors (see below), whose sum is σ = 10102435872. Its totient is φ = 10099804572.

The previous prime is 10101120203. The next prime is 10101120241. The reversal of 10101120221 is 12202110101.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12202110101 = 53693 ⋅227257.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10101120221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101120241) 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, 646241 + ... + 661686.

It is an arithmetic number, because the mean of its divisors is an integer number (2525608968).

Almost surely, 2^10101120221 is an apocalyptic number.

It is an amenable number.

10101120221 is a deficient number, since it is larger than the sum of its proper divisors (1315651).

10101120221 is an equidigital number, since it uses as much as digits as its factorization.

10101120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315650.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10101120221 its reverse (12202110101), we get a palindrome (22303230322).

The spelling of 10101120221 in words is "ten billion, one hundred one million, one hundred twenty thousand, two hundred twenty-one".