1021231131442 has 32 divisors (see below), whose sum is σ = 1665399813120. Its totient is φ = 468112245120.

The previous prime is 1021231131419. The next prime is 1021231131463. The reversal of 1021231131442 is 2441311321201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3326034 + ... + 3620077.

It is an arithmetic number, because the mean of its divisors is an integer number (52043744160).

Almost surely, 2^{1021231131442} is an apocalyptic number.

1021231131442 is a deficient number, since it is larger than the sum of its proper divisors (644168681678).

1021231131442 is a wasteful number, since it uses less digits than its factorization.

1021231131442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6946258.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 1021231131442 its reverse (2441311321201), we get a palindrome (3462542452643).

The spelling of 1021231131442 in words is "one trillion, twenty-one billion, two hundred thirty-one million, one hundred thirty-one thousand, four hundred forty-two".