121221434033201 has 4 divisors (see below), whose sum is σ = 121704387953904. Its totient is φ = 120738480112500.

The previous prime is 121221434033197. The next prime is 121221434033261. The reversal of 121221434033201 is 102330434122121.

It is a happy number.

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 121221434033201 - 2² = 121221434033197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121221434033261) 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, 241476959975 + ... + 241476960476.

It is an arithmetic number, because the mean of its divisors is an integer number (30426096988476).

Almost surely, 2^{121221434033201} is an apocalyptic number.

It is an amenable number.

121221434033201 is a deficient number, since it is larger than the sum of its proper divisors (482953920703).

121221434033201 is an equidigital number, since it uses as much as digits as its factorization.

121221434033201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482953920702.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 121221434033201 its reverse (102330434122121), we get a palindrome (223551868155322).

The spelling of 121221434033201 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, four hundred thirty-four million, thirty-three thousand, two hundred one".