121210100210 has 16 divisors (see below), whose sum is σ = 221251113792. Its totient is φ = 47801166000.

The previous prime is 121210100197. The next prime is 121210100213. The reversal of 121210100210 is 12001012121.

It is a junction number, because it is equal to n+sod(n) for n = 121210100191 and 121210100200.

It is not an unprimeable number, because it can be changed into a prime (121210100213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85358516 + ... + 85359935.

It is an arithmetic number, because the mean of its divisors is an integer number (13828194612).

Almost surely, 2^121210100210 is an apocalyptic number.

121210100210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121210100210 is a deficient number, since it is larger than the sum of its proper divisors (100041013582).

121210100210 is a wasteful number, since it uses less digits than its factorization.

121210100210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170718529.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121210100210 its reverse (12001012121), we get a palindrome (133211112331).

The spelling of 121210100210 in words is "one hundred twenty-one billion, two hundred ten million, one hundred thousand, two hundred ten".