21122102120212 has 6 divisors (see below), whose sum is σ = 36963678710378. Its totient is φ = 10561051060104.

The previous prime is 21122102120137. The next prime is 21122102120239. The reversal of 21122102120212 is 21202120122112.

It can be written as a sum of positive squares in only one way, i.e., 20203640563716 + 918461556496 = 4494846^2 + 958364^2 .

It is a super-2 number, since 2×21122102120212² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21122102120212.

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, 2640262765023 + ... + 2640262765030.

Almost surely, 2^{21122102120212} is an apocalyptic number.

It is an amenable number.

21122102120212 is a deficient number, since it is larger than the sum of its proper divisors (15841576590166).

21122102120212 is a wasteful number, since it uses less digits than its factorization.

21122102120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280525530057 (or 5280525530055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21122102120212 its reverse (21202120122112), we get a palindrome (42324222242324).

The spelling of 21122102120212 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred two million, one hundred twenty thousand, two hundred twelve".