221121020101009 has 4 divisors (see below), whose sum is σ = 252709737258304. Its totient is φ = 189532302943716.

The previous prime is 221121020100989. The next prime is 221121020101019. The reversal of 221121020101009 is 900101020121122.

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 221121020101009 - 2¹⁵ = 221121020068241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221121020101019) 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, 15794358578637 + ... + 15794358578650.

It is an arithmetic number, because the mean of its divisors is an integer number (63177434314576).

Almost surely, 2^{221121020101009} is an apocalyptic number.

It is an amenable number.

221121020101009 is a deficient number, since it is larger than the sum of its proper divisors (31588717157295).

221121020101009 is an equidigital number, since it uses as much as digits as its factorization.

221121020101009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31588717157294.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 221121020101009 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, twenty million, one hundred one thousand, nine".