1215050217061 has 4 divisors (see below), whose sum is σ = 1267878487392. Its totient is φ = 1162221946732.

The previous prime is 1215050217001. The next prime is 1215050217091. The reversal of 1215050217061 is 1607120505121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1215050217061 - 2²³ = 1215041828453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215050217001) 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, 26414135131 + ... + 26414135176.

It is an arithmetic number, because the mean of its divisors is an integer number (316969621848).

Almost surely, 2^{1215050217061} is an apocalyptic number.

It is an amenable number.

1215050217061 is a deficient number, since it is larger than the sum of its proper divisors (52828270331).

1215050217061 is an equidigital number, since it uses as much as digits as its factorization.

1215050217061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52828270330.

The product of its (nonzero) digits is 4200, while the sum is 31.

The spelling of 1215050217061 in words is "one trillion, two hundred fifteen billion, fifty million, two hundred seventeen thousand, sixty-one".