1110111220021 has 8 divisors (see below), whose sum is σ = 1119744152280. Its totient is φ = 1100519899392.

The previous prime is 1110111220019. The next prime is 1110111220027. The reversal of 1110111220021 is 1200221110111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 426198759921 + 683912460100 = 652839^2 + 826990^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1110111220021 - 2¹ = 1110111220019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1110111219983 and 1110111220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110111220027) 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, 10349320 + ... + 10456033.

It is an arithmetic number, because the mean of its divisors is an integer number (139968019035).

Almost surely, 2^{1110111220021} is an apocalyptic number.

It is an amenable number.

1110111220021 is a deficient number, since it is larger than the sum of its proper divisors (9632932259).

1110111220021 is a wasteful number, since it uses less digits than its factorization.

1110111220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20805815.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1110111220021 its reverse (1200221110111), we get a palindrome (2310332330132).

The spelling of 1110111220021 in words is "one trillion, one hundred ten billion, one hundred eleven million, two hundred twenty thousand, twenty-one".