2121120101011 has 4 divisors (see below), whose sum is σ = 2122750479024. Its totient is φ = 2119489723000.

The previous prime is 2121120100991. The next prime is 2121120101039. The reversal of 2121120101011 is 1101010211212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2121120101011 - 2²¹ = 2121118003859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121120100982 and 2121120101000.

It is not an unprimeable number, because it can be changed into a prime (2121120101411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815187055 + ... + 815189656.

It is an arithmetic number, because the mean of its divisors is an integer number (530687619756).

Almost surely, 2^{2121120101011} is an apocalyptic number.

2121120101011 is a deficient number, since it is larger than the sum of its proper divisors (1630378013).

2121120101011 is a wasteful number, since it uses less digits than its factorization.

2121120101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630378012.

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

Adding to 2121120101011 its reverse (1101010211212), we get a palindrome (3222130312223).

The spelling of 2121120101011 in words is "two trillion, one hundred twenty-one billion, one hundred twenty million, one hundred one thousand, eleven".