1212311320101 has 60 divisors (see below), whose sum is σ = 2108786993280. Its totient is φ = 692048039760.

The previous prime is 1212311320037. The next prime is 1212311320141. The reversal of 1212311320101 is 1010231132121.

1212311320101 is a `hidden beast` number, since 1 + 21 + 2 + 311 + 320 + 10 + 1 = 666.

It is not a de Polignac number, because 1212311320101 - 2⁶ = 1212311320037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212311320141) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3779170 + ... + 4087388.

It is an arithmetic number, because the mean of its divisors is an integer number (35146449888).

Almost surely, 2^{1212311320101} is an apocalyptic number.

It is an amenable number.

1212311320101 is a deficient number, since it is larger than the sum of its proper divisors (896475673179).

1212311320101 is an equidigital number, since it uses as much as digits as its factorization.

1212311320101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309236 (or 309220 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1212311320101 its reverse (1010231132121), we get a palindrome (2222542452222).

The spelling of 1212311320101 in words is "one trillion, two hundred twelve billion, three hundred eleven million, three hundred twenty thousand, one hundred one".