211021020212 has 6 divisors (see below), whose sum is σ = 369286785378. Its totient is φ = 105510510104.

The previous prime is 211021020209. The next prime is 211021020239. The reversal of 211021020212 is 212020120112.

It can be written as a sum of positive squares in only one way, i.e., 207912288676 + 3108731536 = 455974^2 + 55756^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26377627523 + ... + 26377627530.

It is an arithmetic number, because the mean of its divisors is an integer number (61547797563).

Almost surely, 2^211021020212 is an apocalyptic number.

It is an amenable number.

211021020212 is a deficient number, since it is larger than the sum of its proper divisors (158265765166).

211021020212 is a wasteful number, since it uses less digits than its factorization.

211021020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52755255057 (or 52755255055 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211021020212 its reverse (212020120112), we get a palindrome (423041140324).

The spelling of 211021020212 in words is "two hundred eleven billion, twenty-one million, twenty thousand, two hundred twelve".