1210002211278 has 256 divisors, whose sum is σ = 3216222720000. Its totient is φ = 329907561984.

The previous prime is 1210002211277. The next prime is 1210002211289. The reversal of 1210002211278 is 8721122000121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210002211277) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 342484000 + ... + 342487532.

It is an arithmetic number, because the mean of its divisors is an integer number (12563370000).

Almost surely, 2^{1210002211278} is an apocalyptic number.

1210002211278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1210002211278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1608111360000).

1210002211278 is an abundant number, since it is smaller than the sum of its proper divisors (2006220508722).

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

1210002211278 is a wasteful number, since it uses less digits than its factorization.

1210002211278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3936 (or 3930 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

Adding to 1210002211278 its reverse (8721122000121), we get a palindrome (9931124211399).

The spelling of 1210002211278 in words is "one trillion, two hundred ten billion, two million, two hundred eleven thousand, two hundred seventy-eight".