211211010221012 has 6 divisors (see below), whose sum is σ = 369619267886778. Its totient is φ = 105605505110504.

The previous prime is 211211010220927. The next prime is 211211010221027. The reversal of 211211010221012 is 210122010112112.

It can be written as a sum of positive squares in only one way, i.e., 146773079620036 + 64437930600976 = 12114994^2 + 8027324^2 .

It is a super-2 number, since 2×211211010221012² (a number of 29 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, 26401376277623 + ... + 26401376277630.

It is an arithmetic number, because the mean of its divisors is an integer number (61603211314463).

Almost surely, 2^{211211010221012} is an apocalyptic number.

It is an amenable number.

211211010221012 is a deficient number, since it is larger than the sum of its proper divisors (158408257665766).

211211010221012 is a wasteful number, since it uses less digits than its factorization.

211211010221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52802752555257 (or 52802752555255 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211211010221012 its reverse (210122010112112), we get a palindrome (421333020333124).

The spelling of 211211010221012 in words is "two hundred eleven trillion, two hundred eleven billion, ten million, two hundred twenty-one thousand, twelve".