1212121000201 has 8 divisors (see below), whose sum is σ = 1254348229320. Its totient is φ = 1169922434688.

The previous prime is 1212121000193. The next prime is 1212121000231. The reversal of 1212121000201 is 1020001212121.

It can be written as a sum of positive squares in 4 ways, for example, as 1005405284601 + 206715715600 = 1002699^2 + 454660^2 .

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 1212121000201 - 2³ = 1212121000193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212121000231) 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, 7079836 + ... + 7249021.

It is an arithmetic number, because the mean of its divisors is an integer number (156793528665).

Almost surely, 2^{1212121000201} is an apocalyptic number.

It is an amenable number.

1212121000201 is a deficient number, since it is larger than the sum of its proper divisors (42227229119).

1212121000201 is a wasteful number, since it uses less digits than its factorization.

1212121000201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14331803.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212121000201 its reverse (1020001212121), we get a palindrome (2232122212322).

The spelling of 1212121000201 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, two hundred one", and thus it is an aban number.