1221101110202 has 16 divisors (see below), whose sum is σ = 1861135265952. Its totient is φ = 600796861200.

The previous prime is 1221101110199. The next prime is 1221101110223. The reversal of 1221101110202 is 2020111011221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18510188 + ... + 18576039.

It is an arithmetic number, because the mean of its divisors is an integer number (116320954122).

Almost surely, 2^{1221101110202} is an apocalyptic number.

1221101110202 is a deficient number, since it is larger than the sum of its proper divisors (640034155750).

1221101110202 is a wasteful number, since it uses less digits than its factorization.

1221101110202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37086493.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1221101110202 its reverse (2020111011221), we get a palindrome (3241212121423).

The spelling of 1221101110202 in words is "one trillion, two hundred twenty-one billion, one hundred one million, one hundred ten thousand, two hundred two".