1215440354100 has 288 divisors, whose sum is σ = 4130791612416. Its totient is φ = 270102643200.

The previous prime is 1215440354083. The next prime is 1215440354197. The reversal of 1215440354100 is 14530445121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 118331965 + ... + 118342235.

It is an arithmetic number, because the mean of its divisors is an integer number (14343026432).

Almost surely, 2^{1215440354100} is an apocalyptic number.

1215440354100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215440354100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2065395806208).

1215440354100 is an abundant number, since it is smaller than the sum of its proper divisors (2915351258316).

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

1215440354100 is a wasteful number, since it uses less digits than its factorization.

1215440354100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11855 (or 11848 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 1215440354100 its reverse (14530445121), we get a palindrome (1229970799221).

The spelling of 1215440354100 in words is "one trillion, two hundred fifteen billion, four hundred forty million, three hundred fifty-four thousand, one hundred".