121022012100221 has 32 divisors (see below), whose sum is σ = 124094476060800. Its totient is φ = 117993266797824.

The previous prime is 121022012100193. The next prime is 121022012100239. The reversal of 121022012100221 is 122001210220121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121022012100221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121022012100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022012103221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3200520911 + ... + 3200558723.

It is an arithmetic number, because the mean of its divisors is an integer number (3877952376900).

Almost surely, 2^{121022012100221} is an apocalyptic number.

It is an amenable number.

121022012100221 is a deficient number, since it is larger than the sum of its proper divisors (3072463960579).

121022012100221 is a wasteful number, since it uses less digits than its factorization.

121022012100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39165.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121022012100221 its reverse (122001210220121), we get a palindrome (243023222320342).

The spelling of 121022012100221 in words is "one hundred twenty-one trillion, twenty-two billion, twelve million, one hundred thousand, two hundred twenty-one".