121011100201001 has 4 divisors (see below), whose sum is σ = 121011739183812. Its totient is φ = 121010461218192.

The previous prime is 121011100200997. The next prime is 121011100201031. The reversal of 121011100201001 is 100102001110121.

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 48883533288976 + 72127566912025 = 6991676^2 + 8492795^2 .

It is a cyclic number.

It is not a de Polignac number, because 121011100201001 - 2² = 121011100200997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121011100201031) 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, 319207250 + ... + 319586123.

It is an arithmetic number, because the mean of its divisors is an integer number (30252934795953).

Almost surely, 2^{121011100201001} is an apocalyptic number.

It is an amenable number.

121011100201001 is a deficient number, since it is larger than the sum of its proper divisors (638982811).

121011100201001 is an equidigital number, since it uses as much as digits as its factorization.

121011100201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638982810.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121011100201001 its reverse (100102001110121), we get a palindrome (221113101311122).

The spelling of 121011100201001 in words is "one hundred twenty-one trillion, eleven billion, one hundred million, two hundred one thousand, one".