42222631256421 has 64 divisors (see below), whose sum is σ = 70708563118080. Its totient is φ = 21771278991360.

The previous prime is 42222631256419. The next prime is 42222631256431. The reversal of 42222631256421 is 12465213622224.

It is not a de Polignac number, because 42222631256421 - 2¹ = 42222631256419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42222631256431) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 299531685 + ... + 299672613.

It is an arithmetic number, because the mean of its divisors is an integer number (1104821298720).

Almost surely, 2^{42222631256421} is an apocalyptic number.

It is an amenable number.

42222631256421 is a deficient number, since it is larger than the sum of its proper divisors (28485931861659).

42222631256421 is a wasteful number, since it uses less digits than its factorization.

42222631256421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150554.

The product of its digits is 552960, while the sum is 42.

Adding to 42222631256421 its reverse (12465213622224), we get a palindrome (54687844878645).

The spelling of 42222631256421 in words is "forty-two trillion, two hundred twenty-two billion, six hundred thirty-one million, two hundred fifty-six thousand, four hundred twenty-one".