221032213121 has 8 divisors (see below), whose sum is σ = 230255520000. Its totient is φ = 211939733520.

The previous prime is 221032213099. The next prime is 221032213139. The reversal of 221032213121 is 121312230122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221032213121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221032213093 and 221032213102.

It is not an unprimeable number, because it can be changed into a prime (221032213321) 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, 32703371 + ... + 32710128.

It is an arithmetic number, because the mean of its divisors is an integer number (28781940000).

Almost surely, 2^221032213121 is an apocalyptic number.

It is an amenable number.

221032213121 is a deficient number, since it is larger than the sum of its proper divisors (9223306879).

221032213121 is a wasteful number, since it uses less digits than its factorization.

221032213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65413639.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 221032213121 its reverse (121312230122), we get a palindrome (342344443243).

The spelling of 221032213121 in words is "two hundred twenty-one billion, thirty-two million, two hundred thirteen thousand, one hundred twenty-one".