140121532253521 has 32 divisors (see below), whose sum is σ = 172666386966528. Its totient is φ = 110731035916800.

The previous prime is 140121532253473. The next prime is 140121532253543. The reversal of 140121532253521 is 125352235121041.

It is a happy number.

It is not a de Polignac number, because 140121532253521 - 2²⁹ = 140120995382609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140121532253621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254140875 + ... + 254691631.

It is an arithmetic number, because the mean of its divisors is an integer number (5395824592704).

Almost surely, 2^{140121532253521} is an apocalyptic number.

It is an amenable number.

140121532253521 is a deficient number, since it is larger than the sum of its proper divisors (32544854713007).

140121532253521 is a wasteful number, since it uses less digits than its factorization.

140121532253521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554161.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 140121532253521 its reverse (125352235121041), we get a palindrome (265473767374562).

The spelling of 140121532253521 in words is "one hundred forty trillion, one hundred twenty-one billion, five hundred thirty-two million, two hundred fifty-three thousand, five hundred twenty-one".