1221331012122 has 32 divisors (see below), whose sum is σ = 2649760287552. Its totient is φ = 373051131264.

The previous prime is 1221331012079. The next prime is 1221331012127. The reversal of 1221331012122 is 2212101331221.

It is not an unprimeable number, because it can be changed into a prime (1221331012127) 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, 57135628 + ... + 57156999.

It is an arithmetic number, because the mean of its divisors is an integer number (82805008986).

Almost surely, 2^{1221331012122} is an apocalyptic number.

1221331012122 is an abundant number, since it is smaller than the sum of its proper divisors (1428429275430).

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

1221331012122 is a wasteful number, since it uses less digits than its factorization.

1221331012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114292782.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1221331012122 its reverse (2212101331221), we get a palindrome (3433432343343).

The spelling of 1221331012122 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-one million, twelve thousand, one hundred twenty-two".