21121203002 has 16 divisors (see below), whose sum is σ = 35003938752. Its totient is φ = 9507241920.

The previous prime is 21121202953. The next prime is 21121203023. The reversal of 21121203002 is 20030212112.

It is a happy number.

It is a super-2 number, since 2×21121203002² (a number of 21 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 13503824 + ... + 13505387.

It is an arithmetic number, because the mean of its divisors is an integer number (2187746172).

Almost surely, 2^21121203002 is an apocalyptic number.

21121203002 is a deficient number, since it is larger than the sum of its proper divisors (13882735750).

21121203002 is a wasteful number, since it uses less digits than its factorization.

21121203002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27009253.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21121203002 its reverse (20030212112), we get a palindrome (41151415114).

The spelling of 21121203002 in words is "twenty-one billion, one hundred twenty-one million, two hundred three thousand, two".