12211000021012 has 24 divisors (see below), whose sum is σ = 23014755031016. Its totient is φ = 5635425788928.

The previous prime is 12211000020991. The next prime is 12211000021093. The reversal of 12211000021012 is 21012000011221.

It can be written as a sum of positive squares in 4 ways, for example, as 669719636496 + 11541280384516 = 818364^2 + 3397246^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 12211000020983 and 12211000021001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8053413 + ... + 9448780.

Almost surely, 2^{12211000021012} is an apocalyptic number.

It is an amenable number.

12211000021012 is a deficient number, since it is larger than the sum of its proper divisors (10803755010004).

12211000021012 is a wasteful number, since it uses less digits than its factorization.

12211000021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17515627 (or 17515625 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12211000021012 its reverse (21012000011221), we get a palindrome (33223000032233).

The spelling of 12211000021012 in words is "twelve trillion, two hundred eleven billion, twenty-one thousand, twelve".