1213201212140 has 24 divisors (see below), whose sum is σ = 2559147319680. Its totient is φ = 483104337408.

The previous prime is 1213201212031. The next prime is 1213201212161. The reversal of 1213201212140 is 412121023121.

It is a super-2 number, since 2×1213201212140² (a number of 25 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136004645 + ... + 136013564.

It is an arithmetic number, because the mean of its divisors is an integer number (106631138320).

Almost surely, 2^{1213201212140} is an apocalyptic number.

1213201212140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213201212140 is an abundant number, since it is smaller than the sum of its proper divisors (1345946107540).

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

1213201212140 is a wasteful number, since it uses less digits than its factorization.

1213201212140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272018441 (or 272018439 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1213201212140 its reverse (412121023121), we get a palindrome (1625322235261).

The spelling of 1213201212140 in words is "one trillion, two hundred thirteen billion, two hundred one million, two hundred twelve thousand, one hundred forty".