121211101120210 has 16 divisors (see below), whose sum is σ = 218247972096600. Its totient is φ = 48469331541376.

The previous prime is 121211101120199. The next prime is 121211101120229. The reversal of 121211101120210 is 12021101112121.

It can be written as a sum of positive squares in 4 ways, for example, as 103180555475089 + 18030545645121 = 10157783^2 + 4246239^2 .

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, 1888579645 + ... + 1888643824.

Almost surely, 2^{121211101120210} is an apocalyptic number.

121211101120210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211101120210 is a deficient number, since it is larger than the sum of its proper divisors (97036870976390).

121211101120210 is a wasteful number, since it uses less digits than its factorization.

121211101120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777226685.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 121211101120210 its reverse (12021101112121), we get a palindrome (133232202232331).

The spelling of 121211101120210 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred one million, one hundred twenty thousand, two hundred ten".