122121210001200 has 480 divisors, whose sum is σ = 399968227061760. Its totient is φ = 31842071654400.

The previous prime is 122121210001187. The next prime is 122121210001207. The reversal of 122121210001200 is 2100012121221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 122121210001200.

It is not an unprimeable number, because it can be changed into a prime (122121210001207) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12128429766 + ... + 12128439834.

It is an arithmetic number, because the mean of its divisors is an integer number (833267139712).

Almost surely, 2^{122121210001200} is an apocalyptic number.

122121210001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122121210001200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199984113530880).

122121210001200 is an abundant number, since it is smaller than the sum of its proper divisors (277847017060560).

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

122121210001200 is a wasteful number, since it uses less digits than its factorization.

122121210001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11117 (or 11106 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 122121210001200 its reverse (2100012121221), we get a palindrome (124221222122421).

The spelling of 122121210001200 in words is "one hundred twenty-two trillion, one hundred twenty-one billion, two hundred ten million, one thousand, two hundred".