1220000021212 has 48 divisors (see below), whose sum is σ = 2455628313600. Its totient is φ = 519511995072.

The previous prime is 1220000021203. The next prime is 1220000021243. The reversal of 1220000021212 is 2121200000221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1220000021192 and 1220000021201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7803789 + ... + 7958587.

It is an arithmetic number, because the mean of its divisors is an integer number (51158923200).

Almost surely, 2^{1220000021212} is an apocalyptic number.

It is an amenable number.

1220000021212 is an abundant number, since it is smaller than the sum of its proper divisors (1235628292388).

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

1220000021212 is a wasteful number, since it uses less digits than its factorization.

1220000021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156610 (or 156608 counting only the distinct ones).

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

Adding to 1220000021212 its reverse (2121200000221), we get a palindrome (3341200021433).

The spelling of 1220000021212 in words is "one trillion, two hundred twenty billion, twenty-one thousand, two hundred twelve".