1212122211201 has 24 divisors (see below), whose sum is σ = 1910152221120. Its totient is φ = 734565112800.

The previous prime is 1212122211161. The next prime is 1212122211203. The reversal of 1212122211201 is 1021122212121.

It is not a de Polignac number, because 1212122211201 - 2⁶ = 1212122211137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212122211203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 910636 + ... + 1803746.

It is an arithmetic number, because the mean of its divisors is an integer number (79589675880).

Almost surely, 2^{1212122211201} is an apocalyptic number.

1212122211201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212122211201 is a deficient number, since it is larger than the sum of its proper divisors (698030009919).

1212122211201 is a wasteful number, since it uses less digits than its factorization.

1212122211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906837 (or 906834 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212122211201 its reverse (1021122212121), we get a palindrome (2233244423322).

The spelling of 1212122211201 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, two hundred eleven thousand, two hundred one".