1221000231130 has 64 divisors (see below), whose sum is σ = 2312178048000. Its totient is φ = 463591964160.

The previous prime is 1221000231109. The next prime is 1221000231233. The reversal of 1221000231130 is 311320001221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69966646 + ... + 69984094.

It is an arithmetic number, because the mean of its divisors is an integer number (36127782000).

Almost surely, 2^{1221000231130} is an apocalyptic number.

1221000231130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221000231130 is a deficient number, since it is larger than the sum of its proper divisors (1091177816870).

1221000231130 is a wasteful number, since it uses less digits than its factorization.

1221000231130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21799.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1221000231130 its reverse (311320001221), we get a palindrome (1532320232351).

The spelling of 1221000231130 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-one thousand, one hundred thirty".