140420204121242 has 4 divisors (see below), whose sum is σ = 210630306181866. Its totient is φ = 70210102060620.

The previous prime is 140420204121157. The next prime is 140420204121259. The reversal of 140420204121242 is 242121402024041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 106980110648161 + 33440093473081 = 10343119^2 + 5782741^2 .

It is a super-2 number, since 2×140420204121242² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35105051030309 + ... + 35105051030312.

Almost surely, 2^{140420204121242} is an apocalyptic number.

140420204121242 is a deficient number, since it is larger than the sum of its proper divisors (70210102060624).

140420204121242 is an equidigital number, since it uses as much as digits as its factorization.

140420204121242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70210102060623.

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 140420204121242 its reverse (242121402024041), we get a palindrome (382541606145283).

The spelling of 140420204121242 in words is "one hundred forty trillion, four hundred twenty billion, two hundred four million, one hundred twenty-one thousand, two hundred forty-two".