121010100013221 has 32 divisors (see below), whose sum is σ = 172550834184960. Its totient is φ = 75247724851200.

The previous prime is 121010100013207. The next prime is 121010100013247. The reversal of 121010100013221 is 122310001010121.

It is not a de Polignac number, because 121010100013221 - 2¹⁴ = 121010099996837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121010100013221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010100011221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4328340 + ... + 16147901.

It is an arithmetic number, because the mean of its divisors is an integer number (5392213568280).

Almost surely, 2^{121010100013221} is an apocalyptic number.

It is an amenable number.

121010100013221 is a deficient number, since it is larger than the sum of its proper divisors (51540734171739).

121010100013221 is a wasteful number, since it uses less digits than its factorization.

121010100013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20478397.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121010100013221 its reverse (122310001010121), we get a palindrome (243320101023342).

The spelling of 121010100013221 in words is "one hundred twenty-one trillion, ten billion, one hundred million, thirteen thousand, two hundred twenty-one".