121021121100223 has 4 divisors (see below), whose sum is σ = 121034778836328. Its totient is φ = 121007463364120.

The previous prime is 121021121100203. The next prime is 121021121100247. The reversal of 121021121100223 is 322001121120121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121021121100223 is a prime.

It is a super-2 number, since 2×121021121100223² (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 121021121100223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021121100203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6828854761 + ... + 6828872482.

It is an arithmetic number, because the mean of its divisors is an integer number (30258694709082).

Almost surely, 2^{121021121100223} is an apocalyptic number.

121021121100223 is a deficient number, since it is larger than the sum of its proper divisors (13657736105).

121021121100223 is an equidigital number, since it uses as much as digits as its factorization.

121021121100223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13657736104.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 121021121100223 its reverse (322001121120121), we get a palindrome (443022242220344).

The spelling of 121021121100223 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred twenty-one million, one hundred thousand, two hundred twenty-three".