21135411510410 has 8 divisors (see below), whose sum is σ = 38043740718756. Its totient is φ = 8454164604160.

The previous prime is 21135411510401. The next prime is 21135411510413. The reversal of 21135411510410 is 1401511453112.

It can be written as a sum of positive squares in 2 ways, for example, as 19508360747929 + 1627050762481 = 4416827^2 + 1275559^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21135411510413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056770575511 + ... + 1056770575530.

Almost surely, 2^{21135411510410} is an apocalyptic number.

21135411510410 is a deficient number, since it is larger than the sum of its proper divisors (16908329208346).

21135411510410 is a wasteful number, since it uses less digits than its factorization.

21135411510410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113541151048.

The product of its (nonzero) digits is 2400, while the sum is 29.

Adding to 21135411510410 its reverse (1401511453112), we get a palindrome (22536922963522).

The spelling of 21135411510410 in words is "twenty-one trillion, one hundred thirty-five billion, four hundred eleven million, five hundred ten thousand, four hundred ten".