221000002210121 has 8 divisors (see below), whose sum is σ = 223066181892960. Its totient is φ = 218933836584928.

The previous prime is 221000002210087. The next prime is 221000002210147. The reversal of 221000002210121 is 121012200000122.

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 221000002210121 - 2²² = 220999998015817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221000002210096 and 221000002210105.

It is not an unprimeable number, because it can be changed into a prime (221000002210151) 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, 29519210 + ... + 36240636.

It is an arithmetic number, because the mean of its divisors is an integer number (27883272736620).

Almost surely, 2^{221000002210121} is an apocalyptic number.

It is an amenable number.

221000002210121 is a deficient number, since it is larger than the sum of its proper divisors (2066179682839).

221000002210121 is a wasteful number, since it uses less digits than its factorization.

221000002210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7028823.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221000002210121 its reverse (121012200000122), we get a palindrome (342012202210243).

The spelling of 221000002210121 in words is "two hundred twenty-one trillion, two million, two hundred ten thousand, one hundred twenty-one".