111100020022021 has 8 divisors (see below), whose sum is σ = 117661923701784. Its totient is φ = 104541072829440.

The previous prime is 111100020021931. The next prime is 111100020022049. The reversal of 111100020022021 is 120220020001111.

It can be written as a sum of positive squares in 4 ways, for example, as 64446953628996 + 46653066393025 = 8027886^2 + 6830305^2 .

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

It is not a de Polignac number, because 111100020022021 - 2⁹ = 111100020021509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111100020021992 and 111100020022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100021022021) 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, 739044420 + ... + 739194733.

It is an arithmetic number, because the mean of its divisors is an integer number (14707740462723).

Almost surely, 2^{111100020022021} is an apocalyptic number.

It is an amenable number.

111100020022021 is a deficient number, since it is larger than the sum of its proper divisors (6561903679763).

111100020022021 is a wasteful number, since it uses less digits than its factorization.

111100020022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478243591.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111100020022021 its reverse (120220020001111), we get a palindrome (231320040023132).

The spelling of 111100020022021 in words is "one hundred eleven trillion, one hundred billion, twenty million, twenty-two thousand, twenty-one".