220101202110021 has 4 divisors (see below), whose sum is σ = 293468269480032. Its totient is φ = 146734134740012.

The previous prime is 220101202109933. The next prime is 220101202110047. The reversal of 220101202110021 is 120011202101022.

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 220101202110021 - 2¹⁴ = 220101202093637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220101202110061) 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, 36683533685001 + ... + 36683533685006.

It is an arithmetic number, because the mean of its divisors is an integer number (73367067370008).

Almost surely, 2^{220101202110021} is an apocalyptic number.

It is an amenable number.

220101202110021 is a deficient number, since it is larger than the sum of its proper divisors (73367067370011).

220101202110021 is an equidigital number, since it uses as much as digits as its factorization.

220101202110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73367067370010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 220101202110021 its reverse (120011202101022), we get a palindrome (340112404211043).

The spelling of 220101202110021 in words is "two hundred twenty trillion, one hundred one billion, two hundred two million, one hundred ten thousand, twenty-one".