121211204033201 has 4 divisors (see below), whose sum is σ = 127590741087600. Its totient is φ = 114831666978804.

The previous prime is 121211204033147. The next prime is 121211204033203. The reversal of 121211204033201 is 102330402112121.

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 121211204033201 - 2¹⁸ = 121211203771057 is a prime.

It is a super-2 number, since 2×121211204033201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121211204033203) 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, 3189768527171 + ... + 3189768527208.

It is an arithmetic number, because the mean of its divisors is an integer number (31897685271900).

Almost surely, 2^{121211204033201} is an apocalyptic number.

It is an amenable number.

121211204033201 is a deficient number, since it is larger than the sum of its proper divisors (6379537054399).

121211204033201 is an equidigital number, since it uses as much as digits as its factorization.

121211204033201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6379537054398.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 121211204033201 its reverse (102330402112121), we get a palindrome (223541606145322).

The spelling of 121211204033201 in words is "one hundred twenty-one trillion, two hundred eleven billion, two hundred four million, thirty-three thousand, two hundred one".