2105212020 has 48 divisors (see below), whose sum is σ = 5929918848. Its totient is φ = 558025600.

The previous prime is 2105212003. The next prime is 2105212037. The reversal of 2105212020 is 202125012.

It is an interprime number because it is at equal distance from previous prime (2105212003) and next prime (2105212037).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 95031 + ... + 115070.

It is an arithmetic number, because the mean of its divisors is an integer number (123539976).

Almost surely, 2^2105212020 is an apocalyptic number.

2105212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105212020 is an abundant number, since it is smaller than the sum of its proper divisors (3824706828).

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

2105212020 is a wasteful number, since it uses less digits than its factorization.

2105212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210280 (or 210278 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 2105212020 is about 45882.5895084399. The cubic root of 2105212020 is about 1281.6377189643.

Adding to 2105212020 its reverse (202125012), we get a palindrome (2307337032).

The spelling of 2105212020 in words is "two billion, one hundred five million, two hundred twelve thousand, twenty".