9401221442 has 54 divisors (see below), whose sum is σ = 15538501377. Its totient is φ = 4265042688.

The previous prime is 9401221439. The next prime is 9401221447. The reversal of 9401221442 is 2441221049.

It can be written as a sum of positive squares in 14 ways, for example, as 6247163521 + 3154057921 = 79039^2 + 56161^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=68561.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9401221447) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 86249684 + ... + 86249792.

Almost surely, 2^9401221442 is an apocalyptic number.

9401221442 is a deficient number, since it is larger than the sum of its proper divisors (6137279935).

9401221442 is a wasteful number, since it uses less digits than its factorization.

9401221442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 9401221442 is about 96959.8960498618. The cubic root of 9401221442 is about 2110.5457017905.

Multiplying 9401221442 by its product of nonzero digits (4608), we get a square (43320828404736 = 6581856²).

The spelling of 9401221442 in words is "nine billion, four hundred one million, two hundred twenty-one thousand, four hundred forty-two".