1211000021212 has 24 divisors (see below), whose sum is σ = 2171165435712. Its totient is φ = 590793278400.

The previous prime is 1211000021207. The next prime is 1211000021221. The reversal of 1211000021212 is 2121200001121.

It is a junction number, because it is equal to n+sod(n) for n = 1211000021192 and 1211000021201.

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, 15741364 + ... + 15818107.

It is an arithmetic number, because the mean of its divisors is an integer number (90465226488).

Almost surely, 2^{1211000021212} is an apocalyptic number.

It is an amenable number.

1211000021212 is a deficient number, since it is larger than the sum of its proper divisors (960165414500).

1211000021212 is a wasteful number, since it uses less digits than its factorization.

1211000021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31559709 (or 31559707 counting only the distinct ones).

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

Adding to 1211000021212 its reverse (2121200001121), we get a palindrome (3332200022333).

The spelling of 1211000021212 in words is "one trillion, two hundred eleven billion, twenty-one thousand, two hundred twelve".