221121011020099 has 4 divisors (see below), whose sum is σ = 221148414797040. Its totient is φ = 221093607243160.

The previous prime is 221121011020073. The next prime is 221121011020103. The reversal of 221121011020099 is 990020110121122.

221121011020099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221121011020099 - 2¹³ = 221121011011907 is a prime.

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 221121011020099.

It is not an unprimeable number, because it can be changed into a prime (221121011020009) 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, 13701876367 + ... + 13701892504.

It is an arithmetic number, because the mean of its divisors is an integer number (55287103699260).

Almost surely, 2^{221121011020099} is an apocalyptic number.

221121011020099 is a deficient number, since it is larger than the sum of its proper divisors (27403776941).

221121011020099 is an equidigital number, since it uses as much as digits as its factorization.

221121011020099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27403776940.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 221121011020099 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, eleven million, twenty thousand, ninety-nine".