1221100210210 has 32 divisors (see below), whose sum is σ = 2360051862912. Its totient is φ = 453233544960.

The previous prime is 1221100210199. The next prime is 1221100210249. The reversal of 1221100210210 is 120120011221.

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, 50572032 + ... + 50596171.

It is an arithmetic number, because the mean of its divisors is an integer number (73751620716).

Almost surely, 2^{1221100210210} is an apocalyptic number.

1221100210210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221100210210 is a deficient number, since it is larger than the sum of its proper divisors (1138951652702).

1221100210210 is a wasteful number, since it uses less digits than its factorization.

1221100210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101168298.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1221100210210 its reverse (120120011221), we get a palindrome (1341220221431).

The spelling of 1221100210210 in words is "one trillion, two hundred twenty-one billion, one hundred million, two hundred ten thousand, two hundred ten".