121012032221 has 8 divisors (see below), whose sum is σ = 123969399288. Its totient is φ = 118054944000.

The previous prime is 121012032209. The next prime is 121012032247. The reversal of 121012032221 is 122230210121.

It can be written as a sum of positive squares in 4 ways, for example, as 6439260025 + 114572772196 = 80245^2 + 338486^2 .

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 121012032221 - 2¹⁰ = 121012031197 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 121012032221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012031221) 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, 1011011 + ... + 1124351.

It is an arithmetic number, because the mean of its divisors is an integer number (15496174911).

Almost surely, 2^121012032221 is an apocalyptic number.

It is an amenable number.

121012032221 is a deficient number, since it is larger than the sum of its proper divisors (2957367067).

121012032221 is a wasteful number, since it uses less digits than its factorization.

121012032221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139423.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121012032221 its reverse (122230210121), we get a palindrome (243242242342).

The spelling of 121012032221 in words is "one hundred twenty-one billion, twelve million, thirty-two thousand, two hundred twenty-one".