121021021210210 has 48 divisors (see below), whose sum is σ = 239443483878648. Its totient is φ = 44007296129280.

The previous prime is 121021021210181. The next prime is 121021021210211. The reversal of 121021021210210 is 12012120120121.

It can be written as a sum of positive squares in 4 ways, for example, as 58326503078041 + 62694518132169 = 7637179^2 + 7917987^2 .

It is not an unprimeable number, because it can be changed into a prime (121021021210211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190956814 + ... + 191589526.

Almost surely, 2^{121021021210210} is an apocalyptic number.

121021021210210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121021021210210 is a deficient number, since it is larger than the sum of its proper divisors (118422462668438).

121021021210210 is a wasteful number, since it uses less digits than its factorization.

121021021210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790819 (or 790808 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121021021210210 its reverse (12012120120121), we get a palindrome (133033141330331).

The spelling of 121021021210210 in words is "one hundred twenty-one trillion, twenty-one billion, twenty-one million, two hundred ten thousand, two hundred ten".