1212110021000 has 64 divisors (see below), whose sum is σ = 2836849841280. Its totient is φ = 484756420800.

The previous prime is 1212110020987. The next prime is 1212110021021. The reversal of 1212110021000 is 1200112121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5576357 + ... + 5789643.

It is an arithmetic number, because the mean of its divisors is an integer number (44325778770).

Almost surely, 2^{1212110021000} is an apocalyptic number.

1212110021000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212110021000 is an abundant number, since it is smaller than the sum of its proper divisors (1624739820280).

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

1212110021000 is a wasteful number, since it uses less digits than its factorization.

1212110021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218991 (or 218977 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1212110021000 its reverse (1200112121), we get a palindrome (1213310133121).

The spelling of 1212110021000 in words is "one trillion, two hundred twelve billion, one hundred ten million, twenty-one thousand".