2111901 has 8 divisors (see below), whose sum is σ = 3071904. Its totient is φ = 1279920.

The previous prime is 2111897. The next prime is 2111909. The reversal of 2111901 is 1091112.

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

It is not a de Polignac number, because 2111901 - 2² = 2111897 is a prime.

It is an Ulam number.

2111901 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31966 + ... + 32031.

It is an arithmetic number, because the mean of its divisors is an integer number (383988).

2^2111901 is an apocalyptic number.

It is an amenable number.

2111901 is a deficient number, since it is larger than the sum of its proper divisors (960003).

2111901 is a wasteful number, since it uses less digits than its factorization.

2111901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64011.

The product of its (nonzero) digits is 18, while the sum is 15.

The square root of 2111901 is about 1453.2381085011. The cubic root of 2111901 is about 128.2993684596.

It can be divided in two parts, 211 and 1901, that added together give a palindrome (2112).

The spelling of 2111901 in words is "two million, one hundred eleven thousand, nine hundred one".