121221110001 has 8 divisors (see below), whose sum is σ = 161631923040. Its totient is φ = 80812185152.

The previous prime is 121221109987. The next prime is 121221110009. The reversal of 121221110001 is 100011122121.

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 121221110001 - 2⁹ = 121221109489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121221110009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314760 + ... + 584393.

It is an arithmetic number, because the mean of its divisors is an integer number (20203990380).

Almost surely, 2^121221110001 is an apocalyptic number.

It is an amenable number.

121221110001 is a deficient number, since it is larger than the sum of its proper divisors (40410813039).

121221110001 is an equidigital number, since it uses as much as digits as its factorization.

121221110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944095.

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

Adding to 121221110001 its reverse (100011122121), we get a palindrome (221232232122).

The spelling of 121221110001 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred ten thousand, one".