22220221111212 has 24 divisors (see below), whose sum is σ = 52471847445696. Its totient is φ = 7317502534288.

The previous prime is 22220221111157. The next prime is 22220221111243. The reversal of 22220221111212 is 21211112202222.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11154728478 + ... + 11154730469.

It is an arithmetic number, because the mean of its divisors is an integer number (2186326976904).

Almost surely, 2^{22220221111212} is an apocalyptic number.

It is an amenable number.

22220221111212 is an abundant number, since it is smaller than the sum of its proper divisors (30251626334484).

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

22220221111212 is a wasteful number, since it uses less digits than its factorization.

22220221111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22309459037 (or 22309459035 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22220221111212 its reverse (21211112202222), we get a palindrome (43431333313434).

The spelling of 22220221111212 in words is "twenty-two trillion, two hundred twenty billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twelve".