21020143130029 has 4 divisors (see below), whose sum is σ = 21934062396576. Its totient is φ = 20106223863484.

The previous prime is 21020143130011. The next prime is 21020143130039. The reversal of 21020143130029 is 92003134102012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21020143130029 - 2¹⁷ = 21020142998957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21020143129979 and 21020143130006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020143130039) 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, 456959633239 + ... + 456959633284.

It is an arithmetic number, because the mean of its divisors is an integer number (5483515599144).

Almost surely, 2^{21020143130029} is an apocalyptic number.

It is an amenable number.

21020143130029 is a deficient number, since it is larger than the sum of its proper divisors (913919266547).

21020143130029 is an equidigital number, since it uses as much as digits as its factorization.

21020143130029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913919266546.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 21020143130029 in words is "twenty-one trillion, twenty billion, one hundred forty-three million, one hundred thirty thousand, twenty-nine".