121231300020000 has 240 divisors, whose sum is σ = 403110362017440. Its totient is φ = 31885491456000.

The previous prime is 121231300019993. The next prime is 121231300020029. The reversal of 121231300020000 is 20003132121.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9459190 + ... + 18219189.

It is an arithmetic number, because the mean of its divisors is an integer number (1679626508406).

Almost surely, 2^{121231300020000} is an apocalyptic number.

121231300020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121231300020000 is an abundant number, since it is smaller than the sum of its proper divisors (281879061997440).

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

121231300020000 is an equidigital number, since it uses as much as digits as its factorization.

121231300020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27678485 (or 27678462 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 121231300020000 its reverse (20003132121), we get a palindrome (121251303152121).

The spelling of 121231300020000 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, three hundred million, twenty thousand".