1212215520107 has 4 divisors (see below), whose sum is σ = 1212246116496. Its totient is φ = 1212184923720.

The previous prime is 1212215520079. The next prime is 1212215520157. The reversal of 1212215520107 is 7010255122121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212215520107 - 2¹⁰ = 1212215519083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212215520107.

It is not an unprimeable number, because it can be changed into a prime (1212215520157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15238688 + ... + 15318029.

It is an arithmetic number, because the mean of its divisors is an integer number (303061529124).

Almost surely, 2^{1212215520107} is an apocalyptic number.

1212215520107 is a deficient number, since it is larger than the sum of its proper divisors (30596389).

1212215520107 is an equidigital number, since it uses as much as digits as its factorization.

1212215520107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30596388.

The product of its (nonzero) digits is 2800, while the sum is 29.

The spelling of 1212215520107 in words is "one trillion, two hundred twelve billion, two hundred fifteen million, five hundred twenty thousand, one hundred seven".