21210230042401 has 16 divisors (see below), whose sum is σ = 22672609223040. Its totient is φ = 19792883735680.

The previous prime is 21210230042399. The next prime is 21210230042509. The reversal of 21210230042401 is 10424003201212.

It is a cyclic number.

It is not a de Polignac number, because 21210230042401 - 2¹ = 21210230042399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21210230045401) 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, 69836991 + ... + 70140043.

It is an arithmetic number, because the mean of its divisors is an integer number (1417038076440).

Almost surely, 2^{21210230042401} is an apocalyptic number.

It is an amenable number.

21210230042401 is a deficient number, since it is larger than the sum of its proper divisors (1462379180639).

21210230042401 is a wasteful number, since it uses less digits than its factorization.

21210230042401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377336.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21210230042401 its reverse (10424003201212), we get a palindrome (31634233243613).

The spelling of 21210230042401 in words is "twenty-one trillion, two hundred ten billion, two hundred thirty million, forty-two thousand, four hundred one".