121001100110221 has 16 divisors (see below), whose sum is σ = 121357306920960. Its totient is φ = 120645466959600.

The previous prime is 121001100110141. The next prime is 121001100110291. The reversal of 121001100110221 is 122011001100121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121001100110221 - 2²¹ = 121001098013069 is a prime.

It is a super-3 number, since 3×121001100110221³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001100110291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3188331796 + ... + 3188369746.

It is an arithmetic number, because the mean of its divisors is an integer number (7584831682560).

Almost surely, 2^{121001100110221} is an apocalyptic number.

It is an amenable number.

121001100110221 is a deficient number, since it is larger than the sum of its proper divisors (356206810739).

121001100110221 is an equidigital number, since it uses as much as digits as its factorization.

121001100110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45264.

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

Adding to 121001100110221 its reverse (122011001100121), we get a palindrome (243012101210342).

The spelling of 121001100110221 in words is "one hundred twenty-one trillion, one billion, one hundred million, one hundred ten thousand, two hundred twenty-one".