121210202210 has 16 divisors (see below), whose sum is σ = 219642651000. Its totient is φ = 48158683776.

The previous prime is 121210202209. The next prime is 121210202227. The reversal of 121210202210 is 12202012121.

It can be written as a sum of positive squares in 4 ways, for example, as 58313073361 + 62897128849 = 241481^2 + 250793^2 .

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, 40673075 + ... + 40676054.

Almost surely, 2^121210202210 is an apocalyptic number.

121210202210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121210202210 is a deficient number, since it is larger than the sum of its proper divisors (98432448790).

121210202210 is a wasteful number, since it uses less digits than its factorization.

121210202210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81349285.

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

Adding to 121210202210 its reverse (12202012121), we get a palindrome (133412214331).

The spelling of 121210202210 in words is "one hundred twenty-one billion, two hundred ten million, two hundred two thousand, two hundred ten".