1021220201212 has 6 divisors (see below), whose sum is σ = 1787135352128. Its totient is φ = 510610100604.

The previous prime is 1021220201207. The next prime is 1021220201219. The reversal of 1021220201212 is 2121020221201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021220201219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127652525148 + ... + 127652525155.

Almost surely, 2^{1021220201212} is an apocalyptic number.

It is an amenable number.

1021220201212 is a deficient number, since it is larger than the sum of its proper divisors (765915150916).

1021220201212 is a wasteful number, since it uses less digits than its factorization.

1021220201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255305050307 (or 255305050305 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1021220201212 its reverse (2121020221201), we get a palindrome (3142240422413).

The spelling of 1021220201212 in words is "one trillion, twenty-one billion, two hundred twenty million, two hundred one thousand, two hundred twelve".