221220432402430 has 32 divisors (see below), whose sum is σ = 406699067746944. Its totient is φ = 86599053252096.

The previous prime is 221220432402407. The next prime is 221220432402499. The reversal of 221220432402430 is 34204234022122.

It is a happy number.

It is a super-2 number, since 2×221220432402430² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221220432402392 and 221220432402401.

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, 10994577 + ... + 23734396.

It is an arithmetic number, because the mean of its divisors is an integer number (12709345867092).

Almost surely, 2^{221220432402430} is an apocalyptic number.

221220432402430 is a deficient number, since it is larger than the sum of its proper divisors (185478635344514).

221220432402430 is a wasteful number, since it uses less digits than its factorization.

221220432402430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34742580.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 221220432402430 its reverse (34204234022122), we get a palindrome (255424666424552).

The spelling of 221220432402430 in words is "two hundred twenty-one trillion, two hundred twenty billion, four hundred thirty-two million, four hundred two thousand, four hundred thirty".