140542212421 has 8 divisors (see below), whose sum is σ = 154208872440. Its totient is φ = 127283512512.

The previous prime is 140542212407. The next prime is 140542212427. The reversal of 140542212421 is 124212245041.

It can be written as a sum of positive squares in 4 ways, for example, as 41877120321 + 98665092100 = 204639^2 + 314110^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 140542212421 - 2³⁵ = 106182474053 is a prime.

It is a super-2 number, since 2×140542212421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140542212421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140542212427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101989306 + ... + 101990683.

It is an arithmetic number, because the mean of its divisors is an integer number (19276109055).

Almost surely, 2^140542212421 is an apocalyptic number.

It is an amenable number.

140542212421 is a deficient number, since it is larger than the sum of its proper divisors (13666660019).

140542212421 is a wasteful number, since it uses less digits than its factorization.

140542212421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203980055.

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 140542212421 its reverse (124212245041), we get a palindrome (264754457462).

The spelling of 140542212421 in words is "one hundred forty billion, five hundred forty-two million, two hundred twelve thousand, four hundred twenty-one".