2102020011 has 96 divisors (see below), whose sum is σ = 3924677120. Its totient is φ = 1082543616.

The previous prime is 2102020003. The next prime is 2102020073. The reversal of 2102020011 is 1100202012.

It is not a de Polignac number, because 2102020011 - 2³ = 2102020003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2102019975 and 2102020002.

It is not an unprimeable number, because it can be changed into a prime (2102020211) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18601891 + ... + 18602003.

Almost surely, 2^2102020011 is an apocalyptic number.

2102020011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2102020011 is a deficient number, since it is larger than the sum of its proper divisors (1822657109).

2102020011 is a wasteful number, since it uses less digits than its factorization.

2102020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2102020011 is about 45847.7917788851. The cubic root of 2102020011 is about 1280.9896340390.

Adding to 2102020011 its reverse (1100202012), we get a palindrome (3202222023).

The spelling of 2102020011 in words is "two billion, one hundred two million, twenty thousand, eleven".