1212212202111 has 48 divisors (see below), whose sum is σ = 1813874182848. Its totient is φ = 779575104000.

The previous prime is 1212212202101. The next prime is 1212212202121. The reversal of 1212212202111 is 1112022122121.

1212212202111 is a `hidden beast` number, since 1 + 212 + 21 + 220 + 211 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (1212212202101) and next prime (1212212202121).

It is not a de Polignac number, because 1212212202111 - 2¹⁰ = 1212212201087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212212202101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28191150 + ... + 28234116.

It is an arithmetic number, because the mean of its divisors is an integer number (37789045476).

Almost surely, 2^{1212212202111} is an apocalyptic number.

1212212202111 is a deficient number, since it is larger than the sum of its proper divisors (601661980737).

1212212202111 is a wasteful number, since it uses less digits than its factorization.

1212212202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43872 (or 43869 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212212202111 its reverse (1112022122121), we get a palindrome (2324234324232).

The spelling of 1212212202111 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred two thousand, one hundred eleven".