121120012100221 has 16 divisors (see below), whose sum is σ = 130578668827200. Its totient is φ = 111974612416128.

The previous prime is 121120012100207. The next prime is 121120012100287. The reversal of 121120012100221 is 122001210021121.

It is a cyclic number.

It is not a de Polignac number, because 121120012100221 - 2⁷ = 121120012100093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121120012100195 and 121120012100204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120012103221) 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, 66674266 + ... + 68466763.

It is an arithmetic number, because the mean of its divisors is an integer number (8161166801700).

Almost surely, 2^{121120012100221} is an apocalyptic number.

It is an amenable number.

121120012100221 is a deficient number, since it is larger than the sum of its proper divisors (9458656726979).

121120012100221 is a wasteful number, since it uses less digits than its factorization.

121120012100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135142188.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121120012100221 its reverse (122001210021121), we get a palindrome (243121222121342).

The spelling of 121120012100221 in words is "one hundred twenty-one trillion, one hundred twenty billion, twelve million, one hundred thousand, two hundred twenty-one".