1221330133210 has 32 divisors (see below), whose sum is σ = 2431100993472. Its totient is φ = 438036209280.

The previous prime is 1221330133201. The next prime is 1221330133217. The reversal of 1221330133210 is 123310331221.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1221330133217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76039924 + ... + 76055983.

It is an arithmetic number, because the mean of its divisors is an integer number (75971906046).

Almost surely, 2^{1221330133210} is an apocalyptic number.

1221330133210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221330133210 is a deficient number, since it is larger than the sum of its proper divisors (1209770860262).

1221330133210 is a wasteful number, since it uses less digits than its factorization.

1221330133210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152095998.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1221330133210 its reverse (123310331221), we get a palindrome (1344640464431).

The spelling of 1221330133210 in words is "one trillion, two hundred twenty-one billion, three hundred thirty million, one hundred thirty-three thousand, two hundred ten".