11111021011644 has 12 divisors (see below), whose sum is σ = 25925715693864. Its totient is φ = 3703673670544.

The previous prime is 11111021011543. The next prime is 11111021011669. The reversal of 11111021011644 is 44611012011111.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462959208807 + ... + 462959208830.

It is an arithmetic number, because the mean of its divisors is an integer number (2160476307822).

Almost surely, 2^{11111021011644} is an apocalyptic number.

It is an amenable number.

11111021011644 is an abundant number, since it is smaller than the sum of its proper divisors (14814694682220).

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

11111021011644 is a wasteful number, since it uses less digits than its factorization.

11111021011644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925918417644 (or 925918417642 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 24.

Adding to 11111021011644 its reverse (44611012011111), we get a palindrome (55722033022755).

The spelling of 11111021011644 in words is "eleven trillion, one hundred eleven billion, twenty-one million, eleven thousand, six hundred forty-four".