121100111202001 has 4 divisors (see below), whose sum is σ = 121100392925092. Its totient is φ = 121099829478912.

The previous prime is 121100111201987. The next prime is 121100111202017. The reversal of 121100111202001 is 100202111001121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95429472977601 + 25670638224400 = 9768801^2 + 5066620^2 .

It is a cyclic number.

It is not a de Polignac number, because 121100111202001 - 2¹⁹ = 121100110677713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121100111202041) 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, 140215776 + ... + 141076801.

It is an arithmetic number, because the mean of its divisors is an integer number (30275098231273).

Almost surely, 2^{121100111202001} is an apocalyptic number.

It is an amenable number.

121100111202001 is a deficient number, since it is larger than the sum of its proper divisors (281723091).

121100111202001 is an equidigital number, since it uses as much as digits as its factorization.

121100111202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281723090.

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

Adding to 121100111202001 its reverse (100202111001121), we get a palindrome (221302222203122).

The spelling of 121100111202001 in words is "one hundred twenty-one trillion, one hundred billion, one hundred eleven million, two hundred two thousand, one".