2221212001211 has 16 divisors (see below), whose sum is σ = 2745041550336. Its totient is φ = 1753776537216.

The previous prime is 2221212001189. The next prime is 2221212001223. The reversal of 2221212001211 is 1121002121222.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221212001211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221212001211.

It is not an unprimeable number, because it can be changed into a prime (2221212001231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198565121 + ... + 198576306.

It is an arithmetic number, because the mean of its divisors is an integer number (171565096896).

Almost surely, 2^{2221212001211} is an apocalyptic number.

2221212001211 is a deficient number, since it is larger than the sum of its proper divisors (523829549125).

2221212001211 is a wasteful number, since it uses less digits than its factorization.

2221212001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397141498.

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

Adding to 2221212001211 its reverse (1121002121222), we get a palindrome (3342214122433).

The spelling of 2221212001211 in words is "two trillion, two hundred twenty-one billion, two hundred twelve million, one thousand, two hundred eleven".