421310233021 has 8 divisors (see below), whose sum is σ = 422712219384. Its totient is φ = 419909145600.

The previous prime is 421310233009. The next prime is 421310233031. The reversal of 421310233021 is 120332013124.

It can be written as a sum of positive squares in 4 ways, for example, as 139838602500 + 281471630521 = 373950^2 + 530539^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 421310233021 - 2⁹ = 421310232509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421310232983 and 421310233001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421310233031) 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, 720771 + ... + 1167103.

It is an arithmetic number, because the mean of its divisors is an integer number (52839027423).

Almost surely, 2^421310233021 is an apocalyptic number.

It is an amenable number.

421310233021 is a deficient number, since it is larger than the sum of its proper divisors (1401986363).

421310233021 is a wasteful number, since it uses less digits than its factorization.

421310233021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449471.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 421310233021 its reverse (120332013124), we get a palindrome (541642246145).

The spelling of 421310233021 in words is "four hundred twenty-one billion, three hundred ten million, two hundred thirty-three thousand, twenty-one".