21444000121010 has 8 divisors (see below), whose sum is σ = 38599200217836. Its totient is φ = 8577600048400.

The previous prime is 21444000120989. The next prime is 21444000121031. The reversal of 21444000121010 is 1012100044412.

It is an interprime number because it is at equal distance from previous prime (21444000120989) and next prime (21444000121031).

It can be written as a sum of positive squares in 2 ways, for example, as 21296259055369 + 147741065641 = 4614787^2 + 384371^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072200006041 + ... + 1072200006060.

Almost surely, 2^{21444000121010} is an apocalyptic number.

21444000121010 is a deficient number, since it is larger than the sum of its proper divisors (17155200096826).

21444000121010 is a wasteful number, since it uses less digits than its factorization.

21444000121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144400012108.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21444000121010 its reverse (1012100044412), we get a palindrome (22456100165422).

The spelling of 21444000121010 in words is "twenty-one trillion, four hundred forty-four billion, one hundred twenty-one thousand, ten".