2111402121 has 8 divisors (see below), whose sum is σ = 2817996960. Its totient is φ = 1406204352.

The previous prime is 2111402119. The next prime is 2111402129. The reversal of 2111402121 is 1212041112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2111402121 - 2¹ = 2111402119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111402121.

It is not an unprimeable number, because it can be changed into a prime (2111402129) 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 7 ways as a sum of consecutive naturals, for example, 345735 + ... + 351788.

It is an arithmetic number, because the mean of its divisors is an integer number (352249620).

Almost surely, 2^2111402121 is an apocalyptic number.

It is an amenable number.

2111402121 is a deficient number, since it is larger than the sum of its proper divisors (706594839).

2111402121 is a wasteful number, since it uses less digits than its factorization.

2111402121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698535.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 2111402121 is about 45949.9958759519. The cubic root of 2111402121 is about 1282.8926525535.

Adding to 2111402121 its reverse (1212041112), we get a palindrome (3323443233).

The spelling of 2111402121 in words is "two billion, one hundred eleven million, four hundred two thousand, one hundred twenty-one".