100021212122 has 16 divisors (see below), whose sum is σ = 164221463112. Its totient is φ = 45406854720.

The previous prime is 100021212107. The next prime is 100021212127. The reversal of 100021212122 is 221212120001.

It can be written as a sum of positive squares in 4 ways, for example, as 38020710121 + 62000502001 = 194989^2 + 248999^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100021212097 and 100021212106.

It is not an unprimeable number, because it can be changed into a prime (100021212127) 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, 31530953 + ... + 31534124.

Almost surely, 2^100021212122 is an apocalyptic number.

100021212122 is a deficient number, since it is larger than the sum of its proper divisors (64200250990).

100021212122 is a wasteful number, since it uses less digits than its factorization.

100021212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63065153.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 100021212122 its reverse (221212120001), we get a palindrome (321233332123).

The spelling of 100021212122 in words is "one hundred billion, twenty-one million, two hundred twelve thousand, one hundred twenty-two".