1042221031402 has 16 divisors (see below), whose sum is σ = 1573844469192. Its totient is φ = 517617909760.

The previous prime is 1042221031393. The next prime is 1042221031409. The reversal of 1042221031402 is 2041301222401.

It can be written as a sum of positive squares in 4 ways, for example, as 898626265681 + 143594765721 = 947959^2 + 378939^2 .

It is not an unprimeable number, because it can be changed into a prime (1042221031409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2746903 + ... + 3103210.

Almost surely, 2^{1042221031402} is an apocalyptic number.

1042221031402 is a deficient number, since it is larger than the sum of its proper divisors (531623437790).

1042221031402 is a wasteful number, since it uses less digits than its factorization.

1042221031402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5850713.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1042221031402 its reverse (2041301222401), we get a palindrome (3083522253803).

The spelling of 1042221031402 in words is "one trillion, forty-two billion, two hundred twenty-one million, thirty-one thousand, four hundred two".