211211101220212 has 6 divisors (see below), whose sum is σ = 369619427135378. Its totient is φ = 105605550610104.

The previous prime is 211211101220201. The next prime is 211211101220237. The reversal of 211211101220212 is 212022101112112.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 164553376442896 + 46657724777316 = 12827836^2 + 6830646^2 .

It is a super-2 number, since 2×211211101220212² (a number of 29 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 211211101220212.

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, 26401387652523 + ... + 26401387652530.

Almost surely, 2^{211211101220212} is an apocalyptic number.

It is an amenable number.

211211101220212 is a deficient number, since it is larger than the sum of its proper divisors (158408325915166).

211211101220212 is a wasteful number, since it uses less digits than its factorization.

211211101220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52802775305057 (or 52802775305055 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211211101220212 its reverse (212022101112112), we get a palindrome (423233202332324).

The spelling of 211211101220212 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred one million, two hundred twenty thousand, two hundred twelve".