2111021020 has 24 divisors (see below), whose sum is σ = 4435498368. Its totient is φ = 843960000.

The previous prime is 2111021009. The next prime is 2111021047. The reversal of 2111021020 is 201201112.

It is a super-3 number, since 3×2111021020³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2111020988 and 2111021006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11970 + ... + 66070.

It is an arithmetic number, because the mean of its divisors is an integer number (184812432).

Almost surely, 2^2111021020 is an apocalyptic number.

2111021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111021020 is an abundant number, since it is smaller than the sum of its proper divisors (2324477348).

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

2111021020 is a wasteful number, since it uses less digits than its factorization.

2111021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56061 (or 56059 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2111021020 is about 45945.8487787526. The cubic root of 2111021020 is about 1282.8154619690.

Adding to 2111021020 its reverse (201201112), we get a palindrome (2312222132).

The spelling of 2111021020 in words is "two billion, one hundred eleven million, twenty-one thousand, twenty".