1311011010 has 48 divisors (see below), whose sum is σ = 3500762616. Its totient is φ = 340153344.

The previous prime is 1311011003. The next prime is 1311011069. The reversal of 1311011010 is 101101131.

It can be written as a sum of positive squares in 4 ways, for example, as 892276641 + 418734369 = 29871^2 + 20463^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1311010983 and 1311011001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193519 + ... + 200178.

Almost surely, 2^1311011010 is an apocalyptic number.

1311011010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311011010 is an abundant number, since it is smaller than the sum of its proper divisors (2189751606).

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

1311011010 is a wasteful number, since it uses less digits than its factorization.

1311011010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393747 (or 393744 counting only the distinct ones).

The product of its (nonzero) digits is 3, while the sum is 9.

The square root of 1311011010 is about 36207.8860194848. The cubic root of 1311011010 is about 1094.4655927346.

Adding to 1311011010 its reverse (101101131), we get a palindrome (1412112141).

The spelling of 1311011010 in words is "one billion, three hundred eleven million, eleven thousand, ten".