121213010000 has 50 divisors (see below), whose sum is σ = 293468842722. Its totient is φ = 48485200000.

The previous prime is 121213009993. The next prime is 121213010027. The reversal of 121213010000 is 10312121.

It can be written as a sum of positive squares in 5 ways, for example, as 67654090816 + 53558919184 = 260104^2 + 231428^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6050651 + ... + 6070650.

Almost surely, 2^121213010000 is an apocalyptic number.

121213010000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121213010000 is an abundant number, since it is smaller than the sum of its proper divisors (172255832722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121213010000 is an equidigital number, since it uses as much as digits as its factorization.

121213010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12121329 (or 12121308 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 121213010000 its reverse (10312121), we get a palindrome (121223322121).

The spelling of 121213010000 in words is "one hundred twenty-one billion, two hundred thirteen million, ten thousand".