4021212422420 has 12 divisors (see below), whose sum is σ = 8444546087124. Its totient is φ = 1608484968960.

The previous prime is 4021212422407. The next prime is 4021212422429. The reversal of 4021212422420 is 242242121204.

It can be written as a sum of positive squares in 2 ways, for example, as 1976346742276 + 2044865680144 = 1405826^2 + 1429988^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4021212422420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021212422429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100530310541 + ... + 100530310580.

It is an arithmetic number, because the mean of its divisors is an integer number (703712173927).

Almost surely, 2^{4021212422420} is an apocalyptic number.

It is an amenable number.

4021212422420 is an abundant number, since it is smaller than the sum of its proper divisors (4423333664704).

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

4021212422420 is a wasteful number, since it uses less digits than its factorization.

4021212422420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201060621130 (or 201060621128 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 4021212422420 its reverse (242242121204), we get a palindrome (4263454543624).

The spelling of 4021212422420 in words is "four trillion, twenty-one billion, two hundred twelve million, four hundred twenty-two thousand, four hundred twenty".