121100001211201 has 4 divisors (see below), whose sum is σ = 121181660013232. Its totient is φ = 121018342409172.

The previous prime is 121100001211171. The next prime is 121100001211229. The reversal of 121100001211201 is 102112100001121.

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 121100001211201 - 2¹¹ = 121100001209153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121100001511201) 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, 40829398791 + ... + 40829401756.

It is an arithmetic number, because the mean of its divisors is an integer number (30295415003308).

Almost surely, 2^{121100001211201} is an apocalyptic number.

It is an amenable number.

121100001211201 is a deficient number, since it is larger than the sum of its proper divisors (81658802031).

121100001211201 is an equidigital number, since it uses as much as digits as its factorization.

121100001211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81658802030.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121100001211201 its reverse (102112100001121), we get a palindrome (223212101212322).

The spelling of 121100001211201 in words is "one hundred twenty-one trillion, one hundred billion, one million, two hundred eleven thousand, two hundred one".