1020442140451 has 2 divisors, whose sum is σ = 1020442140452. Its totient is φ = 1020442140450.

The previous prime is 1020442140407. The next prime is 1020442140479. The reversal of 1020442140451 is 1540412440201.

It is a happy number.

It is an a-pointer prime, because the next prime (1020442140479) can be obtained adding 1020442140451 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020442140451 - 2³⁷ = 883003186979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020442140491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510221070225 + 510221070226.

It is an arithmetic number, because the mean of its divisors is an integer number (510221070226).

Almost surely, 2^{1020442140451} is an apocalyptic number.

1020442140451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020442140451 is an equidigital number, since it uses as much as digits as its factorization.

1020442140451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 1020442140451 its reverse (1540412440201), we get a palindrome (2560854580652).

The spelling of 1020442140451 in words is "one trillion, twenty billion, four hundred forty-two million, one hundred forty thousand, four hundred fifty-one".