1022121211200 has 168 divisors, whose sum is σ = 3444042623712. Its totient is φ = 265198970880.

The previous prime is 1022121211099. The next prime is 1022121211213. The reversal of 1022121211200 is 21121212201.

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 1022121211200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2699994 + ... + 3055193.

Almost surely, 2^{1022121211200} is an apocalyptic number.

1022121211200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022121211200 is an abundant number, since it is smaller than the sum of its proper divisors (2421921412512).

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

1022121211200 is a wasteful number, since it uses less digits than its factorization.

1022121211200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5755249 (or 5755234 counting only the distinct ones).

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

Adding to 1022121211200 its reverse (21121212201), we get a palindrome (1043242423401).

It can be divided in two parts, 1022121 and 211200, that added together give a palindrome (1233321).

The spelling of 1022121211200 in words is "one trillion, twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred".