21252203150204 has 24 divisors (see below), whose sum is σ = 40057345661760. Its totient is φ = 9807456089664.

The previous prime is 21252203150179. The next prime is 21252203150221. The reversal of 21252203150204 is 40205130225212.

It is a happy number.

It is a super-2 number, since 2×21252203150204² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 25694324 + ... + 26508539.

It is an arithmetic number, because the mean of its divisors is an integer number (1669056069240).

Almost surely, 2^{21252203150204} is an apocalyptic number.

It is an amenable number.

21252203150204 is a deficient number, since it is larger than the sum of its proper divisors (18805142511556).

21252203150204 is a wasteful number, since it uses less digits than its factorization.

21252203150204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52210709 (or 52210707 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 21252203150204 its reverse (40205130225212), we get a palindrome (61457333375416).

The spelling of 21252203150204 in words is "twenty-one trillion, two hundred fifty-two billion, two hundred three million, one hundred fifty thousand, two hundred four".