121100210021 has 8 divisors (see below), whose sum is σ = 138872598144. Its totient is φ = 103445911440.

The previous prime is 121100210017. The next prime is 121100210053. The reversal of 121100210021 is 120012001121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121100210021 - 2² = 121100210017 is a prime.

121100210021 is a modest number, since divided by 210021 gives 1211 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 121100209984 and 121100210011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100219021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29520185 + ... + 29524286.

It is an arithmetic number, because the mean of its divisors is an integer number (17359074768).

Almost surely, 2^121100210021 is an apocalyptic number.

It is an amenable number.

121100210021 is a deficient number, since it is larger than the sum of its proper divisors (17772388123).

121100210021 is an equidigital number, since it uses as much as digits as its factorization.

121100210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59044771.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121100210021 its reverse (120012001121), we get a palindrome (241112211142).

The spelling of 121100210021 in words is "one hundred twenty-one billion, one hundred million, two hundred ten thousand, twenty-one".