121144225220005 has 16 divisors (see below), whose sum is σ = 156616840631664. Its totient is φ = 89425364359680.

The previous prime is 121144225219951. The next prime is 121144225220089. The reversal of 121144225220005 is 500022522441121.

It can be written as a sum of positive squares in 8 ways, for example, as 10782771066369 + 110361454153636 = 3283713^2 + 10505306^2 .

It is not a de Polignac number, because 121144225220005 - 2¹¹ = 121144225217957 is a prime.

It is a super-3 number, since 3×121144225220005³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364275976 + ... + 364608385.

It is an arithmetic number, because the mean of its divisors is an integer number (9788552539479).

Almost surely, 2^{121144225220005} is an apocalyptic number.

It is an amenable number.

121144225220005 is a deficient number, since it is larger than the sum of its proper divisors (35472615411659).

121144225220005 is a wasteful number, since it uses less digits than its factorization.

121144225220005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728886936.

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 121144225220005 its reverse (500022522441121), we get a palindrome (621166747661126).

The spelling of 121144225220005 in words is "one hundred twenty-one trillion, one hundred forty-four billion, two hundred twenty-five million, two hundred twenty thousand, five".