121000010221 has 16 divisors (see below), whose sum is σ = 123586214400. Its totient is φ = 118443312000.

The previous prime is 121000010179. The next prime is 121000010231. The reversal of 121000010221 is 122010000121.

It is a cyclic number.

It is not a de Polignac number, because 121000010221 - 2⁷ = 121000010093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121000010198 and 121000010207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000010231) 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, 6205275 + ... + 6224743.

It is an arithmetic number, because the mean of its divisors is an integer number (7724138400).

Almost surely, 2^121000010221 is an apocalyptic number.

It is an amenable number.

121000010221 is a deficient number, since it is larger than the sum of its proper divisors (2586204179).

121000010221 is a wasteful number, since it uses less digits than its factorization.

121000010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20220.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121000010221 its reverse (122010000121), we get a palindrome (243010010342).

It can be divided in two parts, 1210000 and 10221, that added together give a palindrome (1220221).

The spelling of 121000010221 in words is "one hundred twenty-one billion, ten thousand, two hundred twenty-one".