21221442035 has 8 divisors (see below), whose sum is σ = 25612932240. Its totient is φ = 16879019104.

The previous prime is 21221442031. The next prime is 21221442059. The reversal of 21221442035 is 53024412212.

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 21221442035 - 2² = 21221442031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21221441995 and 21221442013.

It is not an unprimeable number, because it can be changed into a prime (21221442031) 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, 12265865 + ... + 12267594.

It is an arithmetic number, because the mean of its divisors is an integer number (3201616530).

Almost surely, 2^21221442035 is an apocalyptic number.

21221442035 is a deficient number, since it is larger than the sum of its proper divisors (4391490205).

21221442035 is a wasteful number, since it uses less digits than its factorization.

21221442035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24533637.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 21221442035 its reverse (53024412212), we get a palindrome (74245854247).

The spelling of 21221442035 in words is "twenty-one billion, two hundred twenty-one million, four hundred forty-two thousand, thirty-five".