121010121101 has 4 divisors (see below), whose sum is σ = 121012665312. Its totient is φ = 121007576892.

The previous prime is 121010121061. The next prime is 121010121121. The reversal of 121010121101 is 101121010121.

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 a de Polignac number, because none of the positive numbers 2^k-121010121101 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 (121010121121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199375 + ... + 1296348.

It is an arithmetic number, because the mean of its divisors is an integer number (30253166328).

Almost surely, 2^121010121101 is an apocalyptic number.

It is an amenable number.

121010121101 is a deficient number, since it is larger than the sum of its proper divisors (2544211).

121010121101 is an equidigital number, since it uses as much as digits as its factorization.

121010121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544210.

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

Adding to 121010121101 its reverse (101121010121), we get a palindrome (222131131222).

It can be divided in two parts, 121010121 and 101, that multiplied together give a palindrome (12222022221).

The spelling of 121010121101 in words is "one hundred twenty-one billion, ten million, one hundred twenty-one thousand, one hundred one".