1211420110240 has 48 divisors (see below), whose sum is σ = 2868977671560. Its totient is φ = 483383255040.

The previous prime is 1211420110231. The next prime is 1211420110273. The reversal of 1211420110240 is 420110241121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1149381256464 + 62038853776 = 1072092^2 + 249076^2 .

It is a super-3 number, since 3×1211420110240³ (a number of 37 digits) contains 333 as substring.

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, 9190521 + ... + 9321400.

Almost surely, 2^{1211420110240} is an apocalyptic number.

1211420110240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211420110240 is an abundant number, since it is smaller than the sum of its proper divisors (1657557561320).

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

1211420110240 is a wasteful number, since it uses less digits than its factorization.

1211420110240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18512345 (or 18512337 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1211420110240 its reverse (420110241121), we get a palindrome (1631530351361).

The spelling of 1211420110240 in words is "one trillion, two hundred eleven billion, four hundred twenty million, one hundred ten thousand, two hundred forty".