121011100010101 has 4 divisors (see below), whose sum is σ = 138298400011552. Its totient is φ = 103723800008652.

The previous prime is 121011100010077. The next prime is 121011100010111. The reversal of 121011100010101 is 101010001110121.

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 121011100010101 - 2¹¹ = 121011100008053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011100010111) 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, 8643650000715 + ... + 8643650000728.

It is an arithmetic number, because the mean of its divisors is an integer number (34574600002888).

Almost surely, 2^{121011100010101} is an apocalyptic number.

It is an amenable number.

121011100010101 is a deficient number, since it is larger than the sum of its proper divisors (17287300001451).

121011100010101 is an equidigital number, since it uses as much as digits as its factorization.

121011100010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17287300001450.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 121011100010101 its reverse (101010001110121), we get a palindrome (222021101120222).

The spelling of 121011100010101 in words is "one hundred twenty-one trillion, eleven billion, one hundred million, ten thousand, one hundred one".