121122021022221 has 16 divisors (see below), whose sum is σ = 171011741793984. Its totient is φ = 75991043099904.

The previous prime is 121122021022193. The next prime is 121122021022231. The reversal of 121122021022221 is 122220120221121.

It is not a de Polignac number, because 121122021022221 - 2¹⁴ = 121122021005837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122021022231) 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, 110193666 + ... + 111287411.

It is an arithmetic number, because the mean of its divisors is an integer number (10688233862124).

Almost surely, 2^{121122021022221} is an apocalyptic number.

It is an amenable number.

121122021022221 is a deficient number, since it is larger than the sum of its proper divisors (49889720771763).

121122021022221 is a wasteful number, since it uses less digits than its factorization.

121122021022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221491820.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121122021022221 its reverse (122220120221121), we get a palindrome (243342141243342).

The spelling of 121122021022221 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, twenty-one million, twenty-two thousand, two hundred twenty-one".