21401210412 has 18 divisors (see below), whose sum is σ = 54097504188. Its totient is φ = 7133736792.

The previous prime is 21401210399. The next prime is 21401210431.

21401210412 is a `hidden beast` number, since 2 + 1 + 40 + 1 + 210 + 412 = 666.

21401210412 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 297238998 + ... + 297239069.

Almost surely, 2^21401210412 is an apocalyptic number.

It is an amenable number.

21401210412 is an abundant number, since it is smaller than the sum of its proper divisors (32696293776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21401210412 is a wasteful number, since it uses less digits than its factorization.

21401210412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594478077 (or 594478072 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The spelling of 21401210412 in words is "twenty-one billion, four hundred one million, two hundred ten thousand, four hundred twelve".