1022153143442 has 4 divisors (see below), whose sum is σ = 1533229715166. Its totient is φ = 511076571720.

The previous prime is 1022153143373. The next prime is 1022153143463. The reversal of 1022153143442 is 2443413512201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 653205020521 + 368948122921 = 808211^2 + 607411^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1022153143399 and 1022153143408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255538285859 + ... + 255538285862.

Almost surely, 2^{1022153143442} is an apocalyptic number.

1022153143442 is a deficient number, since it is larger than the sum of its proper divisors (511076571724).

1022153143442 is an equidigital number, since it uses as much as digits as its factorization.

1022153143442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511076571723.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 1022153143442 its reverse (2443413512201), we get a palindrome (3465566655643).

The spelling of 1022153143442 in words is "one trillion, twenty-two billion, one hundred fifty-three million, one hundred forty-three thousand, four hundred forty-two".