1215110202140 has 24 divisors (see below), whose sum is σ = 2552736545520. Its totient is φ = 485852629248.

The previous prime is 1215110202067. The next prime is 1215110202143. The reversal of 1215110202140 is 412020115121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215110202143) 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 7 ways as a sum of consecutive naturals, for example, 11913677 + ... + 12015236.

It is an arithmetic number, because the mean of its divisors is an integer number (106364022730).

Almost surely, 2^{1215110202140} is an apocalyptic number.

1215110202140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215110202140 is an abundant number, since it is smaller than the sum of its proper divisors (1337626343380).

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

1215110202140 is a wasteful number, since it uses less digits than its factorization.

1215110202140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23931461 (or 23931459 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 1215110202140 its reverse (412020115121), we get a palindrome (1627130317261).

The spelling of 1215110202140 in words is "one trillion, two hundred fifteen billion, one hundred ten million, two hundred two thousand, one hundred forty".