211212021212 has 6 divisors (see below), whose sum is σ = 369621037128. Its totient is φ = 105606010604.

The previous prime is 211212021199. The next prime is 211212021269. The reversal of 211212021212 is 212120212112.

It is a super-2 number, since 2×211212021212² (a number of 23 digits) contains 22 as substring.

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, 26401502648 + ... + 26401502655.

It is an arithmetic number, because the mean of its divisors is an integer number (61603506188).

Almost surely, 2^211212021212 is an apocalyptic number.

It is an amenable number.

211212021212 is a deficient number, since it is larger than the sum of its proper divisors (158409015916).

211212021212 is a wasteful number, since it uses less digits than its factorization.

211212021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52803005307 (or 52803005305 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211212021212 its reverse (212120212112), we get a palindrome (423332233324).

The spelling of 211212021212 in words is "two hundred eleven billion, two hundred twelve million, twenty-one thousand, two hundred twelve".