1211210612016 has 80 divisors (see below), whose sum is σ = 3225583489920. Its totient is φ = 391456903680.

The previous prime is 1211210611951. The next prime is 1211210612033. The reversal of 1211210612016 is 6102160121121.

It is a super-2 number, since 2×1211210612016² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 2722630 + ... + 3136101.

It is an arithmetic number, because the mean of its divisors is an integer number (40319793624).

Almost surely, 2^{1211210612016} is an apocalyptic number.

1211210612016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1211210612016 is an abundant number, since it is smaller than the sum of its proper divisors (2014372877904).

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

1211210612016 is a wasteful number, since it uses less digits than its factorization.

1211210612016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5858874 (or 5858868 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

Adding to 1211210612016 its reverse (6102160121121), we get a palindrome (7313370733137).

The spelling of 1211210612016 in words is "one trillion, two hundred eleven billion, two hundred ten million, six hundred twelve thousand, sixteen".