1213220100312 has 96 divisors (see below), whose sum is σ = 3585053918160. Its totient is φ = 367587072000.

The previous prime is 1213220100271. The next prime is 1213220100353. The reversal of 1213220100312 is 2130010223121.

1213220100312 is a `hidden beast` number, since 1 + 21 + 322 + 0 + 10 + 0 + 312 = 666.

It is an interprime number because it is at equal distance from previous prime (1213220100271) and next prime (1213220100353).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5306112 + ... + 5530032.

Almost surely, 2^{1213220100312} is an apocalyptic number.

1213220100312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213220100312 is an abundant number, since it is smaller than the sum of its proper divisors (2371833817848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213220100312 is a wasteful number, since it uses less digits than its factorization.

1213220100312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230785 (or 230778 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1213220100312 its reverse (2130010223121), we get a palindrome (3343230323433).

The spelling of 1213220100312 in words is "one trillion, two hundred thirteen billion, two hundred twenty million, one hundred thousand, three hundred twelve".