1213550202140 has 24 divisors (see below), whose sum is σ = 2548545155520. Its totient is φ = 485402989248.

The previous prime is 1213550202101. The next prime is 1213550202143. The reversal of 1213550202140 is 412020553121.

It is a super-2 number, since 2×1213550202140² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213550202143) 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, 478052 + ... + 1629611.

It is an arithmetic number, because the mean of its divisors is an integer number (106189381480).

Almost surely, 2^{1213550202140} is an apocalyptic number.

1213550202140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213550202140 is an abundant number, since it is smaller than the sum of its proper divisors (1334994953380).

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

1213550202140 is a wasteful number, since it uses less digits than its factorization.

1213550202140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136461 (or 2136459 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 1213550202140 its reverse (412020553121), we get a palindrome (1625570755261).

The spelling of 1213550202140 in words is "one trillion, two hundred thirteen billion, five hundred fifty million, two hundred two thousand, one hundred forty".