1221211322330 has 32 divisors (see below), whose sum is σ = 2250286182144. Its totient is φ = 476915414976.

The previous prime is 1221211322293. The next prime is 1221211322393. The reversal of 1221211322330 is 332231121221.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1221211322296 and 1221211322305.

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, 362504 + ... + 1604316.

It is an arithmetic number, because the mean of its divisors is an integer number (70321443192).

Almost surely, 2^{1221211322330} is an apocalyptic number.

1221211322330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221211322330 is a deficient number, since it is larger than the sum of its proper divisors (1029074859814).

1221211322330 is a wasteful number, since it uses less digits than its factorization.

1221211322330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244150.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1221211322330 its reverse (332231121221), we get a palindrome (1553442443551).

The spelling of 1221211322330 in words is "one trillion, two hundred twenty-one billion, two hundred eleven million, three hundred twenty-two thousand, three hundred thirty".