121213230100 has 18 divisors (see below), whose sum is σ = 263032709534. Its totient is φ = 48485292000.

The previous prime is 121213230067. The next prime is 121213230121. The reversal of 121213230100 is 1032312121.

It can be written as a sum of positive squares in 3 ways, for example, as 29436951184 + 91776278916 = 171572^2 + 302946^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 606066051 + ... + 606066250.

Almost surely, 2^121213230100 is an apocalyptic number.

121213230100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121213230100 is an abundant number, since it is smaller than the sum of its proper divisors (141819479434).

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

121213230100 is a wasteful number, since it uses less digits than its factorization.

121213230100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212132315 (or 1212132308 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 121213230100 its reverse (1032312121), we get a palindrome (122245542221).

The spelling of 121213230100 in words is "one hundred twenty-one billion, two hundred thirteen million, two hundred thirty thousand, one hundred".