1212021022000 has 120 divisors (see below), whose sum is σ = 2975083020000. Its totient is φ = 477568924800.

The previous prime is 1212021021983. The next prime is 1212021022001. The reversal of 1212021022000 is 2201202121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1212021022001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8910501 + ... + 9045499.

It is an arithmetic number, because the mean of its divisors is an integer number (24792358500).

Almost surely, 2^{1212021022000} is an apocalyptic number.

1212021022000 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 1212021022000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1487541510000).

1212021022000 is an abundant number, since it is smaller than the sum of its proper divisors (1763061998000).

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

1212021022000 is an equidigital number, since it uses as much as digits as its factorization.

1212021022000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135156 (or 135073 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1212021022000 its reverse (2201202121), we get a palindrome (1214222224121).

The spelling of 1212021022000 in words is "one trillion, two hundred twelve billion, twenty-one million, twenty-two thousand".