11111001010021 has 8 divisors (see below), whose sum is σ = 12122373017664. Its totient is φ = 10099842503520.

The previous prime is 11111001010013. The next prime is 11111001010037. The reversal of 11111001010021 is 12001010011111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11111001010021 - 2³ = 11111001010013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111001010621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53266456 + ... + 53474641.

It is an arithmetic number, because the mean of its divisors is an integer number (1515296627208).

Almost surely, 2^{11111001010021} is an apocalyptic number.

11111001010021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11111001010021 is a deficient number, since it is larger than the sum of its proper divisors (1011372007643).

11111001010021 is a wasteful number, since it uses less digits than its factorization.

11111001010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106750571.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 11111001010021 its reverse (12001010011111), we get a palindrome (23112011021132).

The spelling of 11111001010021 in words is "eleven trillion, one hundred eleven billion, one million, ten thousand, twenty-one".