2101212102 has 32 divisors (see below), whose sum is σ = 4591707264. Its totient is φ = 635724800.

The previous prime is 2101212049. The next prime is 2101212103. The reversal of 2101212102 is 2012121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101212103) 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, 17473 + ... + 67139.

It is an arithmetic number, because the mean of its divisors is an integer number (143490852).

Almost surely, 2^2101212102 is an apocalyptic number.

2101212102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2101212102 is an abundant number, since it is smaller than the sum of its proper divisors (2490495162).

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

2101212102 is a wasteful number, since it uses less digits than its factorization.

2101212102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50324.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2101212102 is about 45838.9801588124. The cubic root of 2101212102 is about 1280.8254973725.

Adding to 2101212102 its reverse (2012121012), we get a palindrome (4113333114).

The spelling of 2101212102 in words is "two billion, one hundred one million, two hundred twelve thousand, one hundred two".