2121111110 has 8 divisors (see below), whose sum is σ = 3818000016. Its totient is φ = 848444440.

The previous prime is 2121111077. The next prime is 2121111121. The reversal of 2121111110 is 111111212.

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

It is a super-2 number, since 2×2121111110² = 8998224681930864200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121111091 and 2121111100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106055546 + ... + 106055565.

It is an arithmetic number, because the mean of its divisors is an integer number (477250002).

Almost surely, 2^2121111110 is an apocalyptic number.

2121111110 is a deficient number, since it is larger than the sum of its proper divisors (1696888906).

2121111110 is a wasteful number, since it uses less digits than its factorization.

2121111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212111118.

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

The square root of 2121111110 is about 46055.5220359079. The cubic root of 2121111110 is about 1284.8560473019.

Adding to 2121111110 its reverse (111111212), we get a palindrome (2232222322).

The spelling of 2121111110 in words is "two billion, one hundred twenty-one million, one hundred eleven thousand, one hundred ten".