111202210202121 has 6 divisors (see below), whose sum is σ = 160625414736410. Its totient is φ = 74134806801408.

The previous prime is 111202210202119. The next prime is 111202210202137. The reversal of 111202210202121 is 121202012202111.

111202210202121 is a `hidden beast` number, since 1 + 1 + 120 + 221 + 0 + 202 + 121 = 666.

It can be written as a sum of positive squares in only one way, i.e., 104632215962121 + 6569994240000 = 10228989^2 + 2563200^2 .

It is not a de Polignac number, because 111202210202121 - 2¹ = 111202210202119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111202210202094 and 111202210202103.

It is not an unprimeable number, because it can be changed into a prime (111202210202921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6177900566776 + ... + 6177900566793.

Almost surely, 2^{111202210202121} is an apocalyptic number.

It is an amenable number.

111202210202121 is a deficient number, since it is larger than the sum of its proper divisors (49423204534289).

111202210202121 is a wasteful number, since it uses less digits than its factorization.

111202210202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12355801133575 (or 12355801133572 counting only the distinct ones).

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

Adding to 111202210202121 its reverse (121202012202111), we get a palindrome (232404222404232).

The spelling of 111202210202121 in words is "one hundred eleven trillion, two hundred two billion, two hundred ten million, two hundred two thousand, one hundred twenty-one".