1210022001220 has 96 divisors (see below), whose sum is σ = 2608031720448. Its totient is φ = 471320543232.

The previous prime is 1210022001161. The next prime is 1210022001229. The reversal of 1210022001220 is 221002200121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1210022001220.

It is not an unprimeable number, because it can be changed into a prime (1210022001229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 572654884 + ... + 572656996.

It is an arithmetic number, because the mean of its divisors is an integer number (27166997088).

Almost surely, 2^{1210022001220} is an apocalyptic number.

1210022001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1210022001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1304015860224).

1210022001220 is an abundant number, since it is smaller than the sum of its proper divisors (1398009719228).

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

1210022001220 is a wasteful number, since it uses less digits than its factorization.

1210022001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3869 (or 3867 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1210022001220 its reverse (221002200121), we get a palindrome (1431024201341).

The spelling of 1210022001220 in words is "one trillion, two hundred ten billion, twenty-two million, one thousand, two hundred twenty".