1215005554101 has 4 divisors (see below), whose sum is σ = 1620007405472. Its totient is φ = 810003702732.

The previous prime is 1215005554069. The next prime is 1215005554121. The reversal of 1215005554101 is 1014555005121.

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 not a de Polignac number, because 1215005554101 - 2⁵ = 1215005554069 is a prime.

It is a super-3 number, since 3×1215005554101³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215005554121) 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, 202500925681 + ... + 202500925686.

It is an arithmetic number, because the mean of its divisors is an integer number (405001851368).

Almost surely, 2^{1215005554101} is an apocalyptic number.

It is an amenable number.

1215005554101 is a deficient number, since it is larger than the sum of its proper divisors (405001851371).

1215005554101 is an equidigital number, since it uses as much as digits as its factorization.

1215005554101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405001851370.

The product of its (nonzero) digits is 5000, while the sum is 30.

The spelling of 1215005554101 in words is "one trillion, two hundred fifteen billion, five million, five hundred fifty-four thousand, one hundred one".