2101120501121 has 4 divisors (see below), whose sum is σ = 2101287494592. Its totient is φ = 2100953507652.

The previous prime is 2101120501099. The next prime is 2101120501169. The reversal of 2101120501121 is 1211050211012.

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 2101120501121 - 2⁶ = 2101120501057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101120501121.

It is not an unprimeable number, because it can be changed into a prime (2101120521121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83477861 + ... + 83503026.

It is an arithmetic number, because the mean of its divisors is an integer number (525321873648).

Almost surely, 2^{2101120501121} is an apocalyptic number.

It is an amenable number.

2101120501121 is a deficient number, since it is larger than the sum of its proper divisors (166993471).

2101120501121 is a wasteful number, since it uses less digits than its factorization.

2101120501121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166993470.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 2101120501121 its reverse (1211050211012), we get a palindrome (3312170712133).

The spelling of 2101120501121 in words is "two trillion, one hundred one billion, one hundred twenty million, five hundred one thousand, one hundred twenty-one".