121221200210001 has 8 divisors (see below), whose sum is σ = 161629883774784. Its totient is φ = 80813325059280.

The previous prime is 121221200209999. The next prime is 121221200210009. The reversal of 121221200210001 is 100012002122121.

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

It is not a de Polignac number, because 121221200210001 - 2¹ = 121221200209999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121221200210009) 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, 201753546 + ... + 202353491.

It is an arithmetic number, because the mean of its divisors is an integer number (20203735471848).

Almost surely, 2^{121221200210001} is an apocalyptic number.

It is an amenable number.

121221200210001 is a deficient number, since it is larger than the sum of its proper divisors (40408683564783).

121221200210001 is an equidigital number, since it uses as much as digits as its factorization.

121221200210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404207031.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121221200210001 its reverse (100012002122121), we get a palindrome (221233202332122).

The spelling of 121221200210001 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred million, two hundred ten thousand, one".