1213210120340 has 48 divisors (see below), whose sum is σ = 2610024560640. Its totient is φ = 473421861120.

The previous prime is 1213210120337. The next prime is 1213210120387. The reversal of 1213210120340 is 430210123121.

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

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22591241 + ... + 22644879.

It is an arithmetic number, because the mean of its divisors is an integer number (54375511680).

Almost surely, 2^{1213210120340} is an apocalyptic number.

1213210120340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213210120340 is an abundant number, since it is smaller than the sum of its proper divisors (1396814440300).

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

1213210120340 is a wasteful number, since it uses less digits than its factorization.

1213210120340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81272 (or 81270 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1213210120340 its reverse (430210123121), we get a palindrome (1643420243461).

The spelling of 1213210120340 in words is "one trillion, two hundred thirteen billion, two hundred ten million, one hundred twenty thousand, three hundred forty".