212202011111121 has 6 divisors (see below), whose sum is σ = 306514016049410. Its totient is φ = 141468007407408.

The previous prime is 212202011111117. The next prime is 212202011111137. The reversal of 212202011111121 is 121111110202212.

It is a happy number.

212202011111121 is a `hidden beast` number, since 21 + 220 + 201 + 111 + 112 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 211702500000000 + 499511111121 = 14550000^2 + 706761^2 .

It is not a de Polignac number, because 212202011111121 - 2² = 212202011111117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212202011111094 and 212202011111103.

It is not an unprimeable number, because it can be changed into a prime (212202011911121) 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, 11789000617276 + ... + 11789000617293.

Almost surely, 2^{212202011111121} is an apocalyptic number.

It is an amenable number.

212202011111121 is a deficient number, since it is larger than the sum of its proper divisors (94312004938289).

212202011111121 is a wasteful number, since it uses less digits than its factorization.

212202011111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23578001234575 (or 23578001234572 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 212202011111121 its reverse (121111110202212), we get a palindrome (333313121313333).

The spelling of 212202011111121 in words is "two hundred twelve trillion, two hundred two billion, eleven million, one hundred eleven thousand, one hundred twenty-one".