1221230345430 has 32 divisors (see below), whose sum is σ = 2933244518400. Its totient is φ = 325406793312.

The previous prime is 1221230345429. The next prime is 1221230345453. The reversal of 1221230345430 is 345430321221.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 15875500 + ... + 15952239.

It is an arithmetic number, because the mean of its divisors is an integer number (91663891200).

Almost surely, 2^{1221230345430} is an apocalyptic number.

1221230345430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221230345430 is an abundant number, since it is smaller than the sum of its proper divisors (1712014172970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221230345430 is a wasteful number, since it uses less digits than its factorization.

1221230345430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31829028.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 1221230345430 its reverse (345430321221), we get a palindrome (1566660666651).

The spelling of 1221230345430 in words is "one trillion, two hundred twenty-one billion, two hundred thirty million, three hundred forty-five thousand, four hundred thirty".