1020311245511 has 4 divisors (see below), whose sum is σ = 1074011837400. Its totient is φ = 966610653624.

The previous prime is 1020311245403. The next prime is 1020311245531. The reversal of 1020311245511 is 1155421130201.

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 1020311245511 - 2³⁸ = 745433338567 is a prime.

It is a super-2 number, since 2×1020311245511² (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 (1020311245531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26850295916 + ... + 26850295953.

It is an arithmetic number, because the mean of its divisors is an integer number (268502959350).

Almost surely, 2^{1020311245511} is an apocalyptic number.

1020311245511 is a deficient number, since it is larger than the sum of its proper divisors (53700591889).

1020311245511 is an equidigital number, since it uses as much as digits as its factorization.

1020311245511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53700591888.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 1020311245511 its reverse (1155421130201), we get a palindrome (2175732375712).

The spelling of 1020311245511 in words is "one trillion, twenty billion, three hundred eleven million, two hundred forty-five thousand, five hundred eleven".