121212310000 has 50 divisors (see below), whose sum is σ = 293467147952. Its totient is φ = 48484920000.

The previous prime is 121212309961. The next prime is 121212310049. The reversal of 121212310000 is 13212121.

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

It is a super-2 number, since 2×121212310000² (a number of 23 digits) contains 22 as substring.

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, 6050616 + ... + 6070615.

Almost surely, 2^121212310000 is an apocalyptic number.

121212310000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212310000 is an abundant number, since it is smaller than the sum of its proper divisors (172254837952).

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

121212310000 is an equidigital number, since it uses as much as digits as its factorization.

121212310000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12121259 (or 12121238 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121212310000 its reverse (13212121), we get a palindrome (121225522121).

The spelling of 121212310000 in words is "one hundred twenty-one billion, two hundred twelve million, three hundred ten thousand".