121212002100000 has 288 divisors, whose sum is σ = 454515924868992. Its totient is φ = 27705600000000.

The previous prime is 121212002099999. The next prime is 121212002100011. The reversal of 121212002100000 is 1200212121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26760001 + ... + 30960000.

It is an arithmetic number, because the mean of its divisors is an integer number (1578180294684).

Almost surely, 2^{121212002100000} is an apocalyptic number.

121212002100000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212002100000 is an abundant number, since it is smaller than the sum of its proper divisors (333303922768992).

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

121212002100000 is an frugal number, since it uses more digits than its factorization.

121212002100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57720046 (or 57720018 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121212002100000 its reverse (1200212121), we get a palindrome (121213202312121).

The spelling of 121212002100000 in words is "one hundred twenty-one trillion, two hundred twelve billion, two million, one hundred thousand".