1215412054101 has 128 divisors (see below), whose sum is σ = 2231245209600. Its totient is φ = 638397547200.

The previous prime is 1215412054099. The next prime is 1215412054141. The reversal of 1215412054101 is 1014502145121.

1215412054101 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 41 + 205 + 410 + 1 = 666.

It is not a de Polignac number, because 1215412054101 - 2¹ = 1215412054099 is a prime.

It is a super-2 number, since 2×1215412054101² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215412054141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 23290300 + ... + 23342426.

It is an arithmetic number, because the mean of its divisors is an integer number (17431603200).

Almost surely, 2^{1215412054101} is an apocalyptic number.

It is an amenable number.

1215412054101 is a deficient number, since it is larger than the sum of its proper divisors (1015833155499).

1215412054101 is a wasteful number, since it uses less digits than its factorization.

1215412054101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52356 (or 52350 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

Adding to 1215412054101 its reverse (1014502145121), we get a palindrome (2229914199222).

The spelling of 1215412054101 in words is "one trillion, two hundred fifteen billion, four hundred twelve million, fifty-four thousand, one hundred one".