1011220265660 has 48 divisors (see below), whose sum is σ = 2333280055680. Its totient is φ = 365071007040.

The previous prime is 1011220265659. The next prime is 1011220265669. The reversal of 1011220265660 is 665620221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011220265669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16503434 + ... + 16564593.

It is an arithmetic number, because the mean of its divisors is an integer number (48610001160).

Almost surely, 2^{1011220265660} is an apocalyptic number.

1011220265660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011220265660 is an abundant number, since it is smaller than the sum of its proper divisors (1322059790020).

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

1011220265660 is a wasteful number, since it uses less digits than its factorization.

1011220265660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33068186 (or 33068184 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 1011220265660 its reverse (665620221101), we get a palindrome (1676840486761).

The spelling of 1011220265660 in words is "one trillion, eleven billion, two hundred twenty million, two hundred sixty-five thousand, six hundred sixty".