221020001212 has 6 divisors (see below), whose sum is σ = 386785002128. Its totient is φ = 110510000604.

The previous prime is 221020001203. The next prime is 221020001261. The reversal of 221020001212 is 212100020122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221020001192 and 221020001201.

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, 27627500148 + ... + 27627500155.

Almost surely, 2^221020001212 is an apocalyptic number.

It is an amenable number.

221020001212 is a deficient number, since it is larger than the sum of its proper divisors (165765000916).

221020001212 is a wasteful number, since it uses less digits than its factorization.

221020001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55255000307 (or 55255000305 counting only the distinct ones).

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

Adding to 221020001212 its reverse (212100020122), we get a palindrome (433120021334).

The spelling of 221020001212 in words is "two hundred twenty-one billion, twenty million, one thousand, two hundred twelve".