1211210120000 has 70 divisors (see below), whose sum is σ = 3003407553498. Its totient is φ = 484484032000.

The previous prime is 1211210119991. The next prime is 1211210120047. The reversal of 1211210120000 is 210121121.

It can be written as a sum of positive squares in 5 ways, for example, as 717720729856 + 493489390144 = 847184^2 + 702488^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15100127 + ... + 15180126.

Almost surely, 2^{1211210120000} is an apocalyptic number.

1211210120000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211210120000 is an abundant number, since it is smaller than the sum of its proper divisors (1792197433498).

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

1211210120000 is an frugal number, since it uses more digits than its factorization.

1211210120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30280285 (or 30280260 counting only the distinct ones).

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

Adding to 1211210120000 its reverse (210121121), we get a palindrome (1211420241121).

The spelling of 1211210120000 in words is "one trillion, two hundred eleven billion, two hundred ten million, one hundred twenty thousand".