111121220122021 has 8 divisors (see below), whose sum is σ = 112795795760480. Its totient is φ = 109447116541488.

The previous prime is 111121220122009. The next prime is 111121220122051. The reversal of 111121220122021 is 120221022121111.

It is a happy number.

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 111121220122021 - 2⁴³ = 102325127099813 is a prime.

It is a super-2 number, since 2×111121220122021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111121220122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121220122051) 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, 117540126 + ... + 118481743.

It is an arithmetic number, because the mean of its divisors is an integer number (14099474470060).

Almost surely, 2^{111121220122021} is an apocalyptic number.

It is an amenable number.

111121220122021 is a deficient number, since it is larger than the sum of its proper divisors (1674575638459).

111121220122021 is an equidigital number, since it uses as much as digits as its factorization.

111121220122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236028963.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111121220122021 its reverse (120221022121111), we get a palindrome (231342242243132).

The spelling of 111121220122021 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, twenty-one".