140012000000021 has 4 divisors (see below), whose sum is σ = 142653735849132. Its totient is φ = 137370264150912.

The previous prime is 140012000000003. The next prime is 140012000000063. The reversal of 140012000000021 is 120000000210041.

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

It can be written as a sum of positive squares in 2 ways, for example, as 104989737602500 + 35022262397521 = 10246450^2 + 5917961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140012000000021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140011999999939 and 140012000000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140012000003021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1320867924476 + ... + 1320867924581.

It is an arithmetic number, because the mean of its divisors is an integer number (35663433962283).

Almost surely, 2^{140012000000021} is an apocalyptic number.

It is an amenable number.

140012000000021 is a deficient number, since it is larger than the sum of its proper divisors (2641735849111).

140012000000021 is an equidigital number, since it uses as much as digits as its factorization.

140012000000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641735849110.

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

Adding to 140012000000021 its reverse (120000000210041), we get a palindrome (260012000210062).

The spelling of 140012000000021 in words is "one hundred forty trillion, twelve billion, twenty-one", and thus it is an aban number.