140420204121243 has 24 divisors (see below), whose sum is σ = 195766180016400. Its totient is φ = 89522724765760.

The previous prime is 140420204121157. The next prime is 140420204121259. The reversal of 140420204121243 is 342121402024041.

It is not a de Polignac number, because 140420204121243 - 2¹⁸ = 140420203859099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140420204121243.

It is not an unprimeable number, because it can be changed into a prime (140420204131243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3270768 + ... + 17074493.

It is an arithmetic number, because the mean of its divisors is an integer number (8156924167350).

Almost surely, 2^{140420204121243} is an apocalyptic number.

140420204121243 is a deficient number, since it is larger than the sum of its proper divisors (55345975895157).

140420204121243 is a wasteful number, since it uses less digits than its factorization.

140420204121243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20349659 (or 20349636 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 140420204121243 its reverse (342121402024041), we get a palindrome (482541606145284).

The spelling of 140420204121243 in words is "one hundred forty trillion, four hundred twenty billion, two hundred four million, one hundred twenty-one thousand, two hundred forty-three".