1213022220210 has 192 divisors, whose sum is σ = 3327631463520. Its totient is φ = 306171740160.

The previous prime is 1213022220197. The next prime is 1213022220211. The reversal of 1213022220210 is 120222203121.

1213022220210 is a `hidden beast` number, since 1 + 213 + 0 + 22 + 220 + 210 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 8597183841 + 1204425036369 = 92721^2 + 1097463^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1213022220211) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 48182506 + ... + 48207674.

Almost surely, 2^{1213022220210} is an apocalyptic number.

1213022220210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213022220210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1663815731760).

1213022220210 is an abundant number, since it is smaller than the sum of its proper divisors (2114609243310).

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

1213022220210 is a wasteful number, since it uses less digits than its factorization.

1213022220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25613 (or 25610 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1213022220210 its reverse (120222203121), we get a palindrome (1333244423331).

The spelling of 1213022220210 in words is "one trillion, two hundred thirteen billion, twenty-two million, two hundred twenty thousand, two hundred ten".