20010421321 has 8 divisors (see below), whose sum is σ = 21854973600. Its totient is φ = 18170106240.

The previous prime is 20010421309. The next prime is 20010421331. The reversal of 20010421321 is 12312401002.

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

It is not a de Polignac number, because 20010421321 - 2²⁷ = 19876203593 is a prime.

It is a super-2 number, since 2×20010421321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010421295 and 20010421304.

It is not an unprimeable number, because it can be changed into a prime (20010421331) 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, 1049416 + ... + 1068313.

It is an arithmetic number, because the mean of its divisors is an integer number (2731871700).

Almost surely, 2^20010421321 is an apocalyptic number.

It is an amenable number.

20010421321 is a deficient number, since it is larger than the sum of its proper divisors (1844552279).

20010421321 is a wasteful number, since it uses less digits than its factorization.

20010421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118599.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20010421321 its reverse (12312401002), we get a palindrome (32322822323).

The spelling of 20010421321 in words is "twenty billion, ten million, four hundred twenty-one thousand, three hundred twenty-one".