1221201031210 has 32 divisors (see below), whose sum is σ = 2206272287232. Its totient is φ = 486681249600.

The previous prime is 1221201031187. The next prime is 1221201031247. The reversal of 1221201031210 is 121301021221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2908807 + ... + 3302053.

It is an arithmetic number, because the mean of its divisors is an integer number (68946008976).

Almost surely, 2^{1221201031210} is an apocalyptic number.

1221201031210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221201031210 is a deficient number, since it is larger than the sum of its proper divisors (985071256022).

1221201031210 is a wasteful number, since it uses less digits than its factorization.

1221201031210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394398.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1221201031210 its reverse (121301021221), we get a palindrome (1342502052431).

The spelling of 1221201031210 in words is "one trillion, two hundred twenty-one billion, two hundred one million, thirty-one thousand, two hundred ten".