100002121210 has 16 divisors (see below), whose sum is σ = 180025725096. Its totient is φ = 39995980288.

The previous prime is 100002121169. The next prime is 100002121211. The reversal of 100002121210 is 12121200001.

It can be written as a sum of positive squares in 4 ways, for example, as 99667121401 + 334999809 = 315701^2 + 18303^2 .

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

It is not an unprimeable number, because it can be changed into a prime (100002121211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521659 + ... + 687118.

Almost surely, 2^100002121210 is an apocalyptic number.

100002121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100002121210 is a deficient number, since it is larger than the sum of its proper divisors (80023603886).

100002121210 is a wasteful number, since it uses less digits than its factorization.

100002121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217057.

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

Adding to 100002121210 its reverse (12121200001), we get a palindrome (112123321211).

The spelling of 100002121210 in words is "one hundred billion, two million, one hundred twenty-one thousand, two hundred ten".