21203154202 has 16 divisors (see below), whose sum is σ = 31939139232. Its totient is φ = 10556833680.

The previous prime is 21203154199. The next prime is 21203154257. The reversal of 21203154202 is 20245130212.

It is a happy number.

It is a super-2 number, since 2×21203154202² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742513 + ... + 770539.

It is an arithmetic number, because the mean of its divisors is an integer number (1996196202).

Almost surely, 2^21203154202 is an apocalyptic number.

21203154202 is a deficient number, since it is larger than the sum of its proper divisors (10735985030).

21203154202 is a wasteful number, since it uses less digits than its factorization.

21203154202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29613.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21203154202 its reverse (20245130212), we get a palindrome (41448284414).

The spelling of 21203154202 in words is "twenty-one billion, two hundred three million, one hundred fifty-four thousand, two hundred two".