11021401720 has 64 divisors (see below), whose sum is σ = 28351972800. Its totient is φ = 3777269760.

The previous prime is 11021401667. The next prime is 11021401739. The reversal of 11021401720 is 2710412011.

It is a congruent number.

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, 881110 + ... + 893530.

It is an arithmetic number, because the mean of its divisors is an integer number (442999575).

Almost surely, 2^11021401720 is an apocalyptic number.

11021401720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11021401720 is an abundant number, since it is smaller than the sum of its proper divisors (17330571080).

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

11021401720 is a wasteful number, since it uses less digits than its factorization.

11021401720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15608 (or 15604 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 11021401720 its reverse (2710412011), we get a palindrome (13731813731).

The spelling of 11021401720 in words is "eleven billion, twenty-one million, four hundred one thousand, seven hundred twenty".