121102220210 has 16 divisors (see below), whose sum is σ = 218002233816. Its totient is φ = 48436835328.

The previous prime is 121102220207. The next prime is 121102220227. The reversal of 121102220210 is 12022201121.

It can be written as a sum of positive squares in 4 ways, for example, as 55455069121 + 65647151089 = 235489^2 + 256217^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379577 + ... + 621516.

Almost surely, 2^121102220210 is an apocalyptic number.

121102220210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121102220210 is a deficient number, since it is larger than the sum of its proper divisors (96900013606).

121102220210 is a wasteful number, since it uses less digits than its factorization.

121102220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013197.

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

Adding to 121102220210 its reverse (12022201121), we get a palindrome (133124421331).

The spelling of 121102220210 in words is "one hundred twenty-one billion, one hundred two million, two hundred twenty thousand, two hundred ten".