1221210010202 has 16 divisors (see below), whose sum is σ = 2254541557632. Its totient is φ = 483116047920.

The previous prime is 1221210010117. The next prime is 1221210010231. The reversal of 1221210010202 is 2020100121221.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 3354972374 + ... + 3354972737.

It is an arithmetic number, because the mean of its divisors is an integer number (140908847352).

Almost surely, 2^{1221210010202} is an apocalyptic number.

1221210010202 is a deficient number, since it is larger than the sum of its proper divisors (1033331547430).

1221210010202 is a wasteful number, since it uses less digits than its factorization.

1221210010202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6709945133.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221210010202 its reverse (2020100121221), we get a palindrome (3241310131423).

The spelling of 1221210010202 in words is "one trillion, two hundred twenty-one billion, two hundred ten million, ten thousand, two hundred two".