1221110210202 has 64 divisors (see below), whose sum is σ = 2550021267456. Its totient is φ = 389385881280.

The previous prime is 1221110210153. The next prime is 1221110210209. The reversal of 1221110210202 is 2020120111221.

It is a super-2 number, since 2×1221110210202² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221110210209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10729348 + ... + 10842560.

It is an arithmetic number, because the mean of its divisors is an integer number (39844082304).

Almost surely, 2^{1221110210202} is an apocalyptic number.

1221110210202 is an abundant number, since it is smaller than the sum of its proper divisors (1328911057254).

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

1221110210202 is a wasteful number, since it uses less digits than its factorization.

1221110210202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113915.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221110210202 its reverse (2020120111221), we get a palindrome (3241230321423).

The spelling of 1221110210202 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, two hundred ten thousand, two hundred two".