2221020212 has 6 divisors (see below), whose sum is σ = 3886785378. Its totient is φ = 1110510104.

The previous prime is 2221020161. The next prime is 2221020227. The reversal of 2221020212 is 2120201222.

It can be written as a sum of positive squares in only one way, i.e., 1267075216 + 953944996 = 35596^2 + 30886^2 .

It is a super-2 number, since 2×2221020212² = 9865861564225049888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277627523 + ... + 277627530.

It is an arithmetic number, because the mean of its divisors is an integer number (647797563).

Almost surely, 2^2221020212 is an apocalyptic number.

It is an amenable number.

2221020212 is a deficient number, since it is larger than the sum of its proper divisors (1665765166).

2221020212 is a wasteful number, since it uses less digits than its factorization.

2221020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555255057 (or 555255055 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2221020212 is about 47127.7011109178. The cubic root of 2221020212 is about 1304.7205524084.

Adding to 2221020212 its reverse (2120201222), we get a palindrome (4341221434).

The spelling of 2221020212 in words is "two billion, two hundred twenty-one million, twenty thousand, two hundred twelve".