20211102120221 has 8 divisors (see below), whose sum is σ = 21670876437120. Its totient is φ = 18781426243008.

The previous prime is 20211102120217. The next prime is 20211102120257. The reversal of 20211102120221 is 12202120111202.

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 20211102120221 - 2² = 20211102120217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20211102120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211102120421) 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, 7524608531 + ... + 7524611216.

It is an arithmetic number, because the mean of its divisors is an integer number (2708859554640).

Almost surely, 2^{20211102120221} is an apocalyptic number.

It is an amenable number.

20211102120221 is a deficient number, since it is larger than the sum of its proper divisors (1459774316899).

20211102120221 is a wasteful number, since it uses less digits than its factorization.

20211102120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15049219843.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20211102120221 its reverse (12202120111202), we get a palindrome (32413222231423).

The spelling of 20211102120221 in words is "twenty trillion, two hundred eleven billion, one hundred two million, one hundred twenty thousand, two hundred twenty-one".