1212202122211 has 4 divisors (see below), whose sum is σ = 1212245954392. Its totient is φ = 1212158290032.

The previous prime is 1212202122193. The next prime is 1212202122233. The reversal of 1212202122211 is 1122212022121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212202122211 - 2⁷ = 1212202122083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212202122251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21874581 + ... + 21929926.

It is an arithmetic number, because the mean of its divisors is an integer number (303061488598).

Almost surely, 2^{1212202122211} is an apocalyptic number.

1212202122211 is a deficient number, since it is larger than the sum of its proper divisors (43832181).

1212202122211 is an equidigital number, since it uses as much as digits as its factorization.

1212202122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43832180.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212202122211 its reverse (1122212022121), we get a palindrome (2334414144332).

The spelling of 1212202122211 in words is "one trillion, two hundred twelve billion, two hundred two million, one hundred twenty-two thousand, two hundred eleven".