212121100022 has 48 divisors (see below), whose sum is σ = 365148596160. Its totient is φ = 92056813056.

The previous prime is 212121100021. The next prime is 212121100027. The reversal of 212121100022 is 220001121212.

It is a super-3 number, since 3×212121100022³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121100021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6321104 + ... + 6354572.

It is an arithmetic number, because the mean of its divisors is an integer number (7607262420).

Almost surely, 2^212121100022 is an apocalyptic number.

212121100022 is a deficient number, since it is larger than the sum of its proper divisors (153027496138).

212121100022 is a wasteful number, since it uses less digits than its factorization.

212121100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34617 (or 34604 counting only the distinct ones).

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

Adding to 212121100022 its reverse (220001121212), we get a palindrome (432122221234).

The spelling of 212121100022 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred thousand, twenty-two".