21101231002 has 8 divisors (see below), whose sum is σ = 32249051316. Its totient is φ = 10351547232.

The previous prime is 21101230999. The next prime is 21101231023. The reversal of 21101231002 is 20013210112.

It can be written as a sum of positive squares in 2 ways, for example, as 21082749601 + 18481401 = 145199^2 + 4299^2 .

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, 99534003 + ... + 99534214.

Almost surely, 2^21101231002 is an apocalyptic number.

21101231002 is a deficient number, since it is larger than the sum of its proper divisors (11147820314).

21101231002 is a wasteful number, since it uses less digits than its factorization.

21101231002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199068272.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21101231002 its reverse (20013210112), we get a palindrome (41114441114).

The spelling of 21101231002 in words is "twenty-one billion, one hundred one million, two hundred thirty-one thousand, two".