212400020442 has 16 divisors (see below), whose sum is σ = 425041562880. Its totient is φ = 70759753152.

The previous prime is 212400020419. The next prime is 212400020461. The reversal of 212400020442 is 244020004212.

212400020442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212400020442² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10051983 + ... + 10073090.

It is an arithmetic number, because the mean of its divisors is an integer number (26565097680).

Almost surely, 2^212400020442 is an apocalyptic number.

212400020442 is an abundant number, since it is smaller than the sum of its proper divisors (212641542438).

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

212400020442 is a wasteful number, since it uses less digits than its factorization.

212400020442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20126837.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 212400020442 its reverse (244020004212), we get a palindrome (456420024654).

The spelling of 212400020442 in words is "two hundred twelve billion, four hundred million, twenty thousand, four hundred forty-two".