121001122020221 has 32 divisors (see below), whose sum is σ = 130775141105280. Its totient is φ = 111536847579136.

The previous prime is 121001122020209. The next prime is 121001122020223. The reversal of 121001122020221 is 122020221100121.

It is a cyclic number.

It is not a de Polignac number, because 121001122020221 - 2⁶ = 121001122020157 is a prime.

It is a super-2 number, since 2×121001122020221² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 121001122020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001122020223) 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, 983551505 + ... + 983674521.

It is an arithmetic number, because the mean of its divisors is an integer number (4086723159540).

Almost surely, 2^{121001122020221} is an apocalyptic number.

It is an amenable number.

121001122020221 is a deficient number, since it is larger than the sum of its proper divisors (9774019085059).

121001122020221 is a wasteful number, since it uses less digits than its factorization.

121001122020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126733.

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

Adding to 121001122020221 its reverse (122020221100121), we get a palindrome (243021343120342).

The spelling of 121001122020221 in words is "one hundred twenty-one trillion, one billion, one hundred twenty-two million, twenty thousand, two hundred twenty-one".