2123111020 has 48 divisors (see below), whose sum is σ = 4541594400. Its totient is φ = 833564160.

The previous prime is 2123110993. The next prime is 2123111099. The reversal of 2123111020 is 201113212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243130 + ... + 251710.

It is an arithmetic number, because the mean of its divisors is an integer number (94616550).

Almost surely, 2^2123111020 is an apocalyptic number.

2123111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123111020 is an abundant number, since it is smaller than the sum of its proper divisors (2418483380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2123111020 is a wasteful number, since it uses less digits than its factorization.

2123111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8818 (or 8816 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2123111020 is about 46077.2288663283. The cubic root of 2123111020 is about 1285.2597334138.

Adding to 2123111020 its reverse (201113212), we get a palindrome (2324224232).

The spelling of 2123111020 in words is "two billion, one hundred twenty-three million, one hundred eleven thousand, twenty".