121101200101221 has 16 divisors (see below), whose sum is σ = 163748365977600. Its totient is φ = 79594165733040.

The previous prime is 121101200101213. The next prime is 121101200101229. The reversal of 121101200101221 is 122101002101121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121101200101213) and next prime (121101200101229).

It is not a de Polignac number, because 121101200101221 - 2³ = 121101200101213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121101200101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101200101229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4304905 + ... + 16147278.

It is an arithmetic number, because the mean of its divisors is an integer number (10234272873600).

Almost surely, 2^{121101200101221} is an apocalyptic number.

It is an amenable number.

121101200101221 is a deficient number, since it is larger than the sum of its proper divisors (42647165876379).

121101200101221 is a wasteful number, since it uses less digits than its factorization.

121101200101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20480056.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121101200101221 its reverse (122101002101121), we get a palindrome (243202202202342).

The spelling of 121101200101221 in words is "one hundred twenty-one trillion, one hundred one billion, two hundred million, one hundred one thousand, two hundred twenty-one".