210421104135 has 32 divisors (see below), whose sum is σ = 367407567360. Its totient is φ = 101987049600.

The previous prime is 210421104121. The next prime is 210421104149. The reversal of 210421104135 is 531401124012.

It is an interprime number because it is at equal distance from previous prime (210421104121) and next prime (210421104149).

It is not a de Polignac number, because 210421104135 - 2⁶ = 210421104071 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260790 + ... + 699180.

It is an arithmetic number, because the mean of its divisors is an integer number (11481486480).

Almost surely, 2^210421104135 is an apocalyptic number.

210421104135 is a deficient number, since it is larger than the sum of its proper divisors (156986463225).

210421104135 is a wasteful number, since it uses less digits than its factorization.

210421104135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441319.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 210421104135 its reverse (531401124012), we get a palindrome (741822228147).

The spelling of 210421104135 in words is "two hundred ten billion, four hundred twenty-one million, one hundred four thousand, one hundred thirty-five".