1212020201 has 4 divisors (see below), whose sum is σ = 1385165952. Its totient is φ = 1038874452.

The previous prime is 1212020191. The next prime is 1212020209. The reversal of 1212020201 is 1020202121.

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 not a de Polignac number, because 1212020201 - 2³⁰ = 138278377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212020209) 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, 86572865 + ... + 86572878.

It is an arithmetic number, because the mean of its divisors is an integer number (346291488).

Almost surely, 2^1212020201 is an apocalyptic number.

It is an amenable number.

1212020201 is a deficient number, since it is larger than the sum of its proper divisors (173145751).

1212020201 is an equidigital number, since it uses as much as digits as its factorization.

1212020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173145750.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1212020201 is about 34814.0804991314. The cubic root of 1212020201 is about 1066.1949457905.

Adding to 1212020201 its reverse (1020202121), we get a palindrome (2232222322).

The spelling of 1212020201 in words is "one billion, two hundred twelve million, twenty thousand, two hundred one".