1021423251434 has 16 divisors (see below), whose sum is σ = 1565259361920. Its totient is φ = 499784550720.

The previous prime is 1021423251419. The next prime is 1021423251437. The reversal of 1021423251434 is 4341523241201.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021423251434.

It is not an unprimeable number, because it can be changed into a prime (1021423251437) 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, 28587032 + ... + 28622739.

It is an arithmetic number, because the mean of its divisors is an integer number (97828710120).

Almost surely, 2^{1021423251434} is an apocalyptic number.

1021423251434 is a deficient number, since it is larger than the sum of its proper divisors (543836110486).

1021423251434 is a wasteful number, since it uses less digits than its factorization.

1021423251434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57209965.

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

Adding to 1021423251434 its reverse (4341523241201), we get a palindrome (5362946492635).

The spelling of 1021423251434 in words is "one trillion, twenty-one billion, four hundred twenty-three million, two hundred fifty-one thousand, four hundred thirty-four".