121012222201221 has 16 divisors (see below), whose sum is σ = 178457386588544. Its totient is φ = 72456382522944.

The previous prime is 121012222201219. The next prime is 121012222201243. The reversal of 121012222201221 is 122102222210121.

It is not a de Polignac number, because 121012222201221 - 2¹ = 121012222201219 is a prime.

It is a super-2 number, since 2×121012222201221² (a number of 29 digits) contains 22 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 (121012222201621) 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, 41930775481 + ... + 41930778366.

It is an arithmetic number, because the mean of its divisors is an integer number (11153586661784).

Almost surely, 2^{121012222201221} is an apocalyptic number.

It is an amenable number.

121012222201221 is a deficient number, since it is larger than the sum of its proper divisors (57445164387323).

121012222201221 is a wasteful number, since it uses less digits than its factorization.

121012222201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83861553900.

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

Adding to 121012222201221 its reverse (122102222210121), we get a palindrome (243114444411342).

The spelling of 121012222201221 in words is "one hundred twenty-one trillion, twelve billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty-one".