121221220131001 has 4 divisors (see below), whose sum is σ = 121704173199504. Its totient is φ = 120738267062500.

The previous prime is 121221220130971. The next prime is 121221220131013. The reversal of 121221220131001 is 100131022122121.

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 not a de Polignac number, because 121221220131001 - 2⁹ = 121221220130489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121221220131001.

It is not an unprimeable number, because it can be changed into a prime (121221220131091) 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, 241476533875 + ... + 241476534376.

It is an arithmetic number, because the mean of its divisors is an integer number (30426043299876).

Almost surely, 2^{121221220131001} is an apocalyptic number.

It is an amenable number.

121221220131001 is a deficient number, since it is larger than the sum of its proper divisors (482953068503).

121221220131001 is an equidigital number, since it uses as much as digits as its factorization.

121221220131001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482953068502.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 121221220131001 its reverse (100131022122121), we get a palindrome (221352242253122).

The spelling of 121221220131001 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty million, one hundred thirty-one thousand, one".