1213111221230 has 16 divisors (see below), whose sum is σ = 2183613115680. Its totient is φ = 485241617952.

The previous prime is 1213111221221. The next prime is 1213111221253. The reversal of 1213111221230 is 321221113121.

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, 2503136 + ... + 2948204.

It is an arithmetic number, because the mean of its divisors is an integer number (136475819730).

Almost surely, 2^{1213111221230} is an apocalyptic number.

1213111221230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213111221230 is a deficient number, since it is larger than the sum of its proper divisors (970501894450).

1213111221230 is a wasteful number, since it uses less digits than its factorization.

1213111221230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717643.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1213111221230 its reverse (321221113121), we get a palindrome (1534332334351).

It can be divided in two parts, 1213111 and 221230, that added together give a palindrome (1434341).

The spelling of 1213111221230 in words is "one trillion, two hundred thirteen billion, one hundred eleven million, two hundred twenty-one thousand, two hundred thirty".