121131221001 has 8 divisors (see below), whose sum is σ = 184580908224. Its totient is φ = 69217840560.

The previous prime is 121131220967. The next prime is 121131221017. The reversal of 121131221001 is 100122131121.

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

It is not a de Polignac number, because 121131221001 - 2¹⁷ = 121131089929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121131223001) 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, 2884076670 + ... + 2884076711.

It is an arithmetic number, because the mean of its divisors is an integer number (23072613528).

Almost surely, 2^121131221001 is an apocalyptic number.

It is an amenable number.

121131221001 is a deficient number, since it is larger than the sum of its proper divisors (63449687223).

121131221001 is an equidigital number, since it uses as much as digits as its factorization.

121131221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5768153391.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121131221001 its reverse (100122131121), we get a palindrome (221253352122).

The spelling of 121131221001 in words is "one hundred twenty-one billion, one hundred thirty-one million, two hundred twenty-one thousand, one".