140231020021 has 16 divisors (see below), whose sum is σ = 150316604928. Its totient is φ = 130583750400.

The previous prime is 140231020009. The next prime is 140231020031. The reversal of 140231020021 is 120020132041.

It is a cyclic number.

It is not a de Polignac number, because 140231020021 - 2¹⁷ = 140230888949 is a prime.

It is a super-2 number, since 2×140231020021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140231019977 and 140231020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140231020031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662911 + ... + 848476.

It is an arithmetic number, because the mean of its divisors is an integer number (9394787808).

Almost surely, 2^140231020021 is an apocalyptic number.

It is an amenable number.

140231020021 is a deficient number, since it is larger than the sum of its proper divisors (10085584907).

140231020021 is a wasteful number, since it uses less digits than its factorization.

140231020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511532.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 140231020021 its reverse (120020132041), we get a palindrome (260251152062).

The spelling of 140231020021 in words is "one hundred forty billion, two hundred thirty-one million, twenty thousand, twenty-one".