1311020420502 has 16 divisors (see below), whose sum is σ = 2823736290480. Its totient is φ = 403390898592.

The previous prime is 1311020420473. The next prime is 1311020420533. The reversal of 1311020420502 is 2050240201131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8403976977 + ... + 8403977132.

It is an arithmetic number, because the mean of its divisors is an integer number (176483518155).

Almost surely, 2^{1311020420502} is an apocalyptic number.

1311020420502 is an abundant number, since it is smaller than the sum of its proper divisors (1512715869978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311020420502 is a wasteful number, since it uses less digits than its factorization.

1311020420502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16807954127.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 1311020420502 its reverse (2050240201131), we get a palindrome (3361260621633).

The spelling of 1311020420502 in words is "one trillion, three hundred eleven billion, twenty million, four hundred twenty thousand, five hundred two".