121112202213 has 20 divisors (see below), whose sum is σ = 191563093260. Its totient is φ = 75991969152.

The previous prime is 121112202193. The next prime is 121112202221. The reversal of 121112202213 is 312202211121.

It can be written as a sum of positive squares in 2 ways, for example, as 32163911649 + 88948290564 = 179343^2 + 298242^2 .

It is not a de Polignac number, because 121112202213 - 2¹² = 121112198117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112202293) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43975458 + ... + 43978211.

It is an arithmetic number, because the mean of its divisors is an integer number (9578154663).

Almost surely, 2^121112202213 is an apocalyptic number.

It is an amenable number.

121112202213 is a deficient number, since it is larger than the sum of its proper divisors (70450891047).

121112202213 is an equidigital number, since it uses as much as digits as its factorization.

121112202213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87953698 (or 87953689 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121112202213 its reverse (312202211121), we get a palindrome (433314413334).

The spelling of 121112202213 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred two thousand, two hundred thirteen".