2121013111 has 16 divisors (see below), whose sum is σ = 2556264960. Its totient is φ = 1719174240.

The previous prime is 2121013079. The next prime is 2121013129. The reversal of 2121013111 is 1113101212.

It is a happy number.

It is not a de Polignac number, because 2121013111 - 2⁵ = 2121013079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121013091 and 2121013100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121013511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59766 + ... + 88396.

It is an arithmetic number, because the mean of its divisors is an integer number (159766560).

Almost surely, 2^2121013111 is an apocalyptic number.

2121013111 is a deficient number, since it is larger than the sum of its proper divisors (435251849).

2121013111 is a wasteful number, since it uses less digits than its factorization.

2121013111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29214.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 2121013111 is about 46054.4581012523. The cubic root of 2121013111 is about 1284.8362594737.

Adding to 2121013111 its reverse (1113101212), we get a palindrome (3234114323).

The spelling of 2121013111 in words is "two billion, one hundred twenty-one million, thirteen thousand, one hundred eleven".