221121210020203 has 8 divisors (see below), whose sum is σ = 221352935437008. Its totient is φ = 220889598172704.

The previous prime is 221121210020201. The next prime is 221121210020209. The reversal of 221121210020203 is 302020012121122.

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 221121210020203 - 2¹ = 221121210020201 is a prime.

It is a super-2 number, since 2×221121210020203² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221121210020201) 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, 24495976 + ... + 32284597.

It is an arithmetic number, because the mean of its divisors is an integer number (27669116929626).

Almost surely, 2^{221121210020203} is an apocalyptic number.

221121210020203 is a deficient number, since it is larger than the sum of its proper divisors (231725416805).

221121210020203 is a wasteful number, since it uses less digits than its factorization.

221121210020203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56784653.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221121210020203 its reverse (302020012121122), we get a palindrome (523141222141325).

The spelling of 221121210020203 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two hundred ten million, twenty thousand, two hundred three".