140102021 has 8 divisors (see below), whose sum is σ = 140986560. Its totient is φ = 139220928.

The previous prime is 140102003. The next prime is 140102023. The reversal of 140102021 is 120201041.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140102021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140101993 and 140102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140102023) 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, 147470 + ... + 148416.

It is an arithmetic number, because the mean of its divisors is an integer number (17623320).

Almost surely, 2^140102021 is an apocalyptic number.

It is an amenable number.

140102021 is a deficient number, since it is larger than the sum of its proper divisors (884539).

140102021 is an equidigital number, since it uses as much as digits as its factorization.

140102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 140102021 is about 11836.4699551851. The cubic root of 140102021 is about 519.3755089504.

Adding to 140102021 its reverse (120201041), we get a palindrome (260303062).

It can be divided in two parts, 1401020 and 21, that added together give a palindrome (1401041).

The spelling of 140102021 in words is "one hundred forty million, one hundred two thousand, twenty-one".