1212111100201 has 16 divisors (see below), whose sum is σ = 1324953400320. Its totient is φ = 1103892387840.

The previous prime is 1212111100199. The next prime is 1212111100247. The reversal of 1212111100201 is 1020011112121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1212111100201 - 2¹ = 1212111100199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212111100261) 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, 5029465 + ... + 5264953.

It is an arithmetic number, because the mean of its divisors is an integer number (82809587520).

Almost surely, 2^{1212111100201} is an apocalyptic number.

It is an amenable number.

1212111100201 is a deficient number, since it is larger than the sum of its proper divisors (112842300119).

1212111100201 is a wasteful number, since it uses less digits than its factorization.

1212111100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245304.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1212111100201 its reverse (1020011112121), we get a palindrome (2232122212322).

The spelling of 1212111100201 in words is "one trillion, two hundred twelve billion, one hundred eleven million, one hundred thousand, two hundred one".