212122022122100 has 36 divisors (see below), whose sum is σ = 460841899962444. Its totient is φ = 84749802036480.

The previous prime is 212122022122099. The next prime is 212122022122121. The reversal of 212122022122100 is 1221220221212.

It can be written as a sum of positive squares in 6 ways, for example, as 10063131995536 + 202058890126564 = 3172244^2 + 14214742^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 1237499027 + ... + 1237670426.

Almost surely, 2^{212122022122100} is an apocalyptic number.

212122022122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212122022122100 is an abundant number, since it is smaller than the sum of its proper divisors (248719877840344).

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

212122022122100 is a wasteful number, since it uses less digits than its factorization.

212122022122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475170324 (or 2475170317 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 212122022122100 its reverse (1221220221212), we get a palindrome (213343242343312).

The spelling of 212122022122100 in words is "two hundred twelve trillion, one hundred twenty-two billion, twenty-two million, one hundred twenty-two thousand, one hundred".