22013331421 has 8 divisors (see below), whose sum is σ = 22220109560. Its totient is φ = 21806641152.

The previous prime is 22013331409. The next prime is 22013331437. The reversal of 22013331421 is 12413331022.

It can be written as a sum of positive squares in 4 ways, for example, as 13250312100 + 8763019321 = 115110^2 + 93611^2 .

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

It is not a de Polignac number, because 22013331421 - 2⁷ = 22013331293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22013331392 and 22013331401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22013331401) 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, 551101 + ... + 589693.

It is an arithmetic number, because the mean of its divisors is an integer number (2777513695).

Almost surely, 2^22013331421 is an apocalyptic number.

It is an amenable number.

22013331421 is a deficient number, since it is larger than the sum of its proper divisors (206778139).

22013331421 is a wasteful number, since it uses less digits than its factorization.

22013331421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43935.

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

Adding to 22013331421 its reverse (12413331022), we get a palindrome (34426662443).

The spelling of 22013331421 in words is "twenty-two billion, thirteen million, three hundred thirty-one thousand, four hundred twenty-one".