120201212121 has 16 divisors (see below), whose sum is σ = 164259977280. Its totient is φ = 78140263680.

The previous prime is 120201212119. The next prime is 120201212171. The reversal of 120201212121 is 121212102021.

It is not a de Polignac number, because 120201212121 - 2¹ = 120201212119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120201212121.

It is not an unprimeable number, because it can be changed into a prime (120201212171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31 + ... + 490308.

It is an arithmetic number, because the mean of its divisors is an integer number (10266248580).

Almost surely, 2^120201212121 is an apocalyptic number.

It is an amenable number.

120201212121 is a deficient number, since it is larger than the sum of its proper divisors (44058765159).

120201212121 is a wasteful number, since it uses less digits than its factorization.

120201212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492376.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 120201212121 its reverse (121212102021), we get a palindrome (241413314142).

The spelling of 120201212121 in words is "one hundred twenty billion, two hundred one million, two hundred twelve thousand, one hundred twenty-one".