1331011111020 has 48 divisors (see below), whose sum is σ = 3726881168640. Its totient is φ = 354931528896.

The previous prime is 1331011110997. The next prime is 1331011111037. The reversal of 1331011111020 is 201111101331.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8656371 + ... + 8808789.

It is an arithmetic number, because the mean of its divisors is an integer number (77643357680).

Almost surely, 2^{1331011111020} is an apocalyptic number.

1331011111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331011111020 is an abundant number, since it is smaller than the sum of its proper divisors (2395870057620).

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

1331011111020 is a wasteful number, since it uses less digits than its factorization.

1331011111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297974 (or 297972 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 1331011111020 its reverse (201111101331), we get a palindrome (1532122212351).

The spelling of 1331011111020 in words is "one trillion, three hundred thirty-one billion, eleven million, one hundred eleven thousand, twenty".