121000120210 has 64 divisors (see below), whose sum is σ = 231743967840. Its totient is φ = 45329858560.

The previous prime is 121000120187. The next prime is 121000120217. The reversal of 121000120210 is 12021000121.

It can be written as a sum of positive squares in 16 ways, for example, as 42099242761 + 78900877449 = 205181^2 + 280893^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (121000120217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52402536 + ... + 52404844.

Almost surely, 2^121000120210 is an apocalyptic number.

121000120210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121000120210 is a deficient number, since it is larger than the sum of its proper divisors (110743847630).

121000120210 is a wasteful number, since it uses less digits than its factorization.

121000120210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121000120210 its reverse (12021000121), we get a palindrome (133021120331).

The spelling of 121000120210 in words is "one hundred twenty-one billion, one hundred twenty thousand, two hundred ten".