21401219002 has 8 divisors (see below), whose sum is σ = 32102611956. Its totient is φ = 10700348352.

The previous prime is 21401218987. The next prime is 21401219011. The reversal of 21401219002 is 20091210412.

It can be written as a sum of positive squares in 2 ways, for example, as 13227070081 + 8174148921 = 115009^2 + 90411^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3343 + ... + 206914.

Almost surely, 2^21401219002 is an apocalyptic number.

21401219002 is a deficient number, since it is larger than the sum of its proper divisors (10701392954).

21401219002 is a wasteful number, since it uses less digits than its factorization.

21401219002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261152.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21401219002 its reverse (20091210412), we get a palindrome (41492429414).

The spelling of 21401219002 in words is "twenty-one billion, four hundred one million, two hundred nineteen thousand, two".