1321222131010 has 64 divisors (see below), whose sum is σ = 2439303672960. Its totient is φ = 514970426880.

The previous prime is 1321222130999. The next prime is 1321222131023. The reversal of 1321222131010 is 101312221231.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 552118374 + ... + 552120766.

It is an arithmetic number, because the mean of its divisors is an integer number (38114119890).

Almost surely, 2^{1321222131010} is an apocalyptic number.

1321222131010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321222131010 is a deficient number, since it is larger than the sum of its proper divisors (1118081541950).

1321222131010 is a wasteful number, since it uses less digits than its factorization.

1321222131010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4963.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1321222131010 its reverse (101312221231), we get a palindrome (1422534352241).

It can be divided in two parts, 13212221 and 31010, that added together give a triangular number (13243231 = T₅₁₄₆).

The spelling of 1321222131010 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-two million, one hundred thirty-one thousand, ten".