1020424251311 has 4 divisors (see below), whose sum is σ = 1029785941800. Its totient is φ = 1011062560824.

The previous prime is 1020424251307. The next prime is 1020424251359. The reversal of 1020424251311 is 1131524240201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1020424251311 - 2² = 1020424251307 is a prime.

It is a super-2 number, since 2×1020424251311² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020424251361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4680845081 + ... + 4680845298.

It is an arithmetic number, because the mean of its divisors is an integer number (257446485450).

Almost surely, 2^{1020424251311} is an apocalyptic number.

1020424251311 is a deficient number, since it is larger than the sum of its proper divisors (9361690489).

1020424251311 is an equidigital number, since it uses as much as digits as its factorization.

1020424251311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9361690488.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 1020424251311 its reverse (1131524240201), we get a palindrome (2151948491512).

The spelling of 1020424251311 in words is "one trillion, twenty billion, four hundred twenty-four million, two hundred fifty-one thousand, three hundred eleven".