212021442402 has 256 divisors, whose sum is σ = 544908349440. Its totient is φ = 53415936000.

The previous prime is 212021442397. The next prime is 212021442407. The reversal of 212021442402 is 204244120212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212021442397) and next prime (212021442407).

It is not an unprimeable number, because it can be changed into a prime (212021442407) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 629143578 + ... + 629143914.

It is an arithmetic number, because the mean of its divisors is an integer number (2128548240).

Almost surely, 2^212021442402 is an apocalyptic number.

212021442402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 212021442402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272454174720).

212021442402 is an abundant number, since it is smaller than the sum of its proper divisors (332886907038).

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

212021442402 is a wasteful number, since it uses less digits than its factorization.

212021442402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 212021442402 its reverse (204244120212), we get a palindrome (416265562614).

The spelling of 212021442402 in words is "two hundred twelve billion, twenty-one million, four hundred forty-two thousand, four hundred two".