1221013210010 has 64 divisors (see below), whose sum is σ = 2502192881664. Its totient is φ = 424645531200.

The previous prime is 1221013209991. The next prime is 1221013210051. The reversal of 1221013210010 is 100123101221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22973687 + ... + 23026773.

It is an arithmetic number, because the mean of its divisors is an integer number (39096763776).

Almost surely, 2^{1221013210010} is an apocalyptic number.

1221013210010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221013210010 is an abundant number, since it is smaller than the sum of its proper divisors (1281179671654).

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

1221013210010 is a wasteful number, since it uses less digits than its factorization.

1221013210010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62219.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1221013210010 its reverse (100123101221), we get a palindrome (1321136311231).

The spelling of 1221013210010 in words is "one trillion, two hundred twenty-one billion, thirteen million, two hundred ten thousand, ten".