2221201220212 has 12 divisors (see below), whose sum is σ = 4186109992036. Its totient is φ = 1025169793920.

The previous prime is 2221201220131. The next prime is 2221201220243. The reversal of 2221201220212 is 2120221021222.

It can be written as a sum of positive squares in 2 ways, for example, as 713477544976 + 1507723675236 = 844676^2 + 1227894^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2221201220212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21357703989 + ... + 21357704092.

Almost surely, 2^{2221201220212} is an apocalyptic number.

It is an amenable number.

2221201220212 is a deficient number, since it is larger than the sum of its proper divisors (1964908771824).

2221201220212 is a wasteful number, since it uses less digits than its factorization.

2221201220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42715408098 (or 42715408096 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2221201220212 its reverse (2120221021222), we get a palindrome (4341422241434).

The spelling of 2221201220212 in words is "two trillion, two hundred twenty-one billion, two hundred one million, two hundred twenty thousand, two hundred twelve".