121020220201 has 4 divisors (see below), whose sum is σ = 124924098304. Its totient is φ = 117116342100.

The previous prime is 121020220117. The next prime is 121020220213. The reversal of 121020220201 is 102022020121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121020220201 - 2¹⁹ = 121019695913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121020220901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1951939005 + ... + 1951939066.

It is an arithmetic number, because the mean of its divisors is an integer number (31231024576).

Almost surely, 2^121020220201 is an apocalyptic number.

It is an amenable number.

121020220201 is a deficient number, since it is larger than the sum of its proper divisors (3903878103).

121020220201 is an equidigital number, since it uses as much as digits as its factorization.

121020220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3903878102.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121020220201 its reverse (102022020121), we get a palindrome (223042240322).

The spelling of 121020220201 in words is "one hundred twenty-one billion, twenty million, two hundred twenty thousand, two hundred one".