1212022001000 has 32 divisors (see below), whose sum is σ = 2836131484680. Its totient is φ = 484808800000.

The previous prime is 1212022000939. The next prime is 1212022001063. The reversal of 1212022001000 is 1002202121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 88129421956 + 1123892579044 = 296866^2 + 1060138^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606010001 + ... + 606012000.

Almost surely, 2^{1212022001000} is an apocalyptic number.

1212022001000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212022001000 is an abundant number, since it is smaller than the sum of its proper divisors (1624109483680).

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

1212022001000 is a wasteful number, since it uses less digits than its factorization.

1212022001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212022022 (or 1212022008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1212022001000 its reverse (1002202121), we get a palindrome (1213024203121).

The spelling of 1212022001000 in words is "one trillion, two hundred twelve billion, twenty-two million, one thousand".