1221212313030 has 32 divisors (see below), whose sum is σ = 3010123325664. Its totient is φ = 316855086336.

The previous prime is 1221212313023. The next prime is 1221212313047. The reversal of 1221212313030 is 303132121221.

It is a junction number, because it is equal to n+sod(n) for n = 1221212312988 and 1221212313006.

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, 550094527 + ... + 550096746.

It is an arithmetic number, because the mean of its divisors is an integer number (94066353927).

Almost surely, 2^{1221212313030} is an apocalyptic number.

1221212313030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221212313030 is an abundant number, since it is smaller than the sum of its proper divisors (1788911012634).

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

1221212313030 is a wasteful number, since it uses less digits than its factorization.

1221212313030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100191320.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1221212313030 its reverse (303132121221), we get a palindrome (1524344434251).

The spelling of 1221212313030 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, three hundred thirteen thousand, thirty".