1220210021212 has 96 divisors (see below), whose sum is σ = 2720450113920. Its totient is φ = 465786961920.

The previous prime is 1220210021143. The next prime is 1220210021213. The reversal of 1220210021212 is 2121200120221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220210021213) 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, 17456412 + ... + 17526172.

It is an arithmetic number, because the mean of its divisors is an integer number (28338022020).

Almost surely, 2^{1220210021212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220210021212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1360225056960).

1220210021212 is an abundant number, since it is smaller than the sum of its proper divisors (1500240092708).

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

1220210021212 is a wasteful number, since it uses less digits than its factorization.

1220210021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71471 (or 71469 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220210021212 its reverse (2121200120221), we get a palindrome (3341410141433).

Subtracting 1220210021212 from its reverse (2121200120221), we obtain a palindrome (900990099009).

The spelling of 1220210021212 in words is "one trillion, two hundred twenty billion, two hundred ten million, twenty-one thousand, two hundred twelve".