121220210201 has 4 divisors (see below), whose sum is σ = 122420410404. Its totient is φ = 120020010000.

The previous prime is 121220210141. The next prime is 121220210203. The reversal of 121220210201 is 102012022121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60898394176 + 60321816025 = 246776^2 + 245605^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220210201 - 2¹⁴ = 121220193817 is a prime.

It is a super-2 number, since 2×121220210201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220210203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600099950 + ... + 600100151.

It is an arithmetic number, because the mean of its divisors is an integer number (30605102601).

Almost surely, 2^121220210201 is an apocalyptic number.

It is an amenable number.

121220210201 is a deficient number, since it is larger than the sum of its proper divisors (1200200203).

121220210201 is a wasteful number, since it uses less digits than its factorization.

121220210201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200200202.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121220210201 its reverse (102012022121), we get a palindrome (223232232322).

The spelling of 121220210201 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred ten thousand, two hundred one".