121220222202001 has 8 divisors (see below), whose sum is σ = 130544945562024. Its totient is φ = 111895511825280.

The previous prime is 121220222201999. The next prime is 121220222202007. The reversal of 121220222202001 is 100202222022121.

It can be written as a sum of positive squares in 4 ways, for example, as 4903673651776 + 116316548550225 = 2214424^2 + 10785015^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121220222202001 - 2¹ = 121220222201999 is a prime.

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 121220222202001.

It is not an unprimeable number, because it can be changed into a prime (121220222202007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25718391 + ... + 30064531.

It is an arithmetic number, because the mean of its divisors is an integer number (16318118195253).

Almost surely, 2^{121220222202001} is an apocalyptic number.

It is an amenable number.

121220222202001 is a deficient number, since it is larger than the sum of its proper divisors (9324723360023).

121220222202001 is a wasteful number, since it uses less digits than its factorization.

121220222202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6491651.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 121220222202001 its reverse (100202222022121), we get a palindrome (221422444224122).

The spelling of 121220222202001 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred two thousand, one".