21221523051230 has 32 divisors (see below), whose sum is σ = 38402022481920. Its totient is φ = 8443443278880.

The previous prime is 21221523051199. The next prime is 21221523051251. The reversal of 21221523051230 is 3215032512212.

It is a happy number.

It is a super-2 number, since 2×21221523051230² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21221523051193 and 21221523051202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22119851 + ... + 23059289.

It is an arithmetic number, because the mean of its divisors is an integer number (1200063202560).

Almost surely, 2^{21221523051230} is an apocalyptic number.

21221523051230 is a deficient number, since it is larger than the sum of its proper divisors (17180499430690).

21221523051230 is a wasteful number, since it uses less digits than its factorization.

21221523051230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951464.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 21221523051230 its reverse (3215032512212), we get a palindrome (24436555563442).

The spelling of 21221523051230 in words is "twenty-one trillion, two hundred twenty-one billion, five hundred twenty-three million, fifty-one thousand, two hundred thirty".