121100001010221 has 32 divisors (see below), whose sum is σ = 173925140963328. Its totient is φ = 74730777865920.

The previous prime is 121100001010217. The next prime is 121100001010259. The reversal of 121100001010221 is 122010100001121.

It is not a de Polignac number, because 121100001010221 - 2² = 121100001010217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121100001010197 and 121100001010206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100001010271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126144190 + ... + 127100576.

It is an arithmetic number, because the mean of its divisors is an integer number (5435160655104).

Almost surely, 2^{121100001010221} is an apocalyptic number.

It is an amenable number.

121100001010221 is a deficient number, since it is larger than the sum of its proper divisors (52825139953107).

121100001010221 is a wasteful number, since it uses less digits than its factorization.

121100001010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015641.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121100001010221 its reverse (122010100001121), we get a palindrome (243110101011342).

The spelling of 121100001010221 in words is "one hundred twenty-one trillion, one hundred billion, one million, ten thousand, two hundred twenty-one".