1212200101 has 16 divisors (see below), whose sum is σ = 1397289600. Its totient is φ = 1030125888.

The previous prime is 1212200089. The next prime is 1212200107. The reversal of 1212200101 is 1010022121.

It is a cyclic number.

It is not a de Polignac number, because 1212200101 - 2²⁵ = 1178645669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212200107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506215 + ... + 508603.

It is an arithmetic number, because the mean of its divisors is an integer number (87330600).

Almost surely, 2^1212200101 is an apocalyptic number.

It is an amenable number.

1212200101 is a deficient number, since it is larger than the sum of its proper divisors (185089499).

1212200101 is a wasteful number, since it uses less digits than its factorization.

1212200101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2988.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1212200101 is about 34816.6641279718. The cubic root of 1212200101 is about 1066.2476949062.

Adding to 1212200101 its reverse (1010022121), we get a palindrome (2222222222).

The spelling of 1212200101 in words is "one billion, two hundred twelve million, two hundred thousand, one hundred one".