1212019889040 has 80 divisors (see below), whose sum is σ = 4174735180800. Its totient is φ = 323205303168.

The previous prime is 1212019889039. The next prime is 1212019889051. The reversal of 1212019889040 is 409889102121.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×1212019889040³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280558000 + ... + 280562319.

It is an arithmetic number, because the mean of its divisors is an integer number (52184189760).

Almost surely, 2^{1212019889040} is an apocalyptic number.

1212019889040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212019889040 is an abundant number, since it is smaller than the sum of its proper divisors (2962715291760).

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

1212019889040 is a wasteful number, since it uses less digits than its factorization.

1212019889040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561120341 (or 561120329 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 1212019889040 in words is "one trillion, two hundred twelve billion, nineteen million, eight hundred eighty-nine thousand, forty".