121010000221 has 4 divisors (see below), whose sum is σ = 132010909344. Its totient is φ = 110009091100.

The previous prime is 121010000143. The next prime is 121010000263. The reversal of 121010000221 is 122000010121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121010000221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121010000198 and 121010000207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010000291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5500454545 + ... + 5500454566.

It is an arithmetic number, because the mean of its divisors is an integer number (33002727336).

Almost surely, 2^121010000221 is an apocalyptic number.

121010000221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121010000221 is a deficient number, since it is larger than the sum of its proper divisors (11000909123).

121010000221 is a wasteful number, since it uses less digits than its factorization.

121010000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000909122.

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

Adding to 121010000221 its reverse (122000010121), we get a palindrome (243010010342).

The spelling of 121010000221 in words is "one hundred twenty-one billion, ten million, two hundred twenty-one", and thus it is an aban number.