21202201012 has 12 divisors (see below), whose sum is σ = 37130885316. Its totient is φ = 10593376640.

The previous prime is 21202200959. The next prime is 21202201051. The reversal of 21202201012 is 21010220212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15734190096 + 5468010916 = 125436^2 + 73946^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21202200983 and 21202201001.

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, 1924789 + ... + 1935772.

It is an arithmetic number, because the mean of its divisors is an integer number (3094240443).

Almost surely, 2^21202201012 is an apocalyptic number.

It is an amenable number.

21202201012 is a deficient number, since it is larger than the sum of its proper divisors (15928684304).

21202201012 is a wasteful number, since it uses less digits than its factorization.

21202201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3861938 (or 3861936 counting only the distinct ones).

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

Adding to 21202201012 its reverse (21010220212), we get a palindrome (42212421224).

The spelling of 21202201012 in words is "twenty-one billion, two hundred two million, two hundred one thousand, twelve".