100021220212 has 36 divisors (see below), whose sum is σ = 184892516676. Its totient is φ = 47337943680.

The previous prime is 100021220191. The next prime is 100021220263. The reversal of 100021220212 is 212022120001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 35625052516 + 64396167696 = 188746^2 + 253764^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100021220192 and 100021220201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1693662 + ... + 1751722.

It is an arithmetic number, because the mean of its divisors is an integer number (5135903241).

Almost surely, 2^100021220212 is an apocalyptic number.

It is an amenable number.

100021220212 is a deficient number, since it is larger than the sum of its proper divisors (84871296464).

100021220212 is a wasteful number, since it uses less digits than its factorization.

100021220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59296 (or 59275 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 100021220212 its reverse (212022120001), we get a palindrome (312043340213).

The spelling of 100021220212 in words is "one hundred billion, twenty-one million, two hundred twenty thousand, two hundred twelve".