2212210202121 has 6 divisors (see below), whose sum is σ = 3195414736410. Its totient is φ = 1474806801408.

The previous prime is 2212210202107. The next prime is 2212210202179. The reversal of 2212210202121 is 1212020122122.

It is a happy number.

2212210202121 is a `hidden beast` number, since 221 + 2 + 210 + 20 + 212 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1623422546496 + 588787655625 = 1274136^2 + 767325^2 .

It is not a de Polignac number, because 2212210202121 - 2⁹ = 2212210201609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2212210202094 and 2212210202103.

It is not an unprimeable number, because it can be changed into a prime (2212210202101) 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, 122900566776 + ... + 122900566793.

It is an arithmetic number, because the mean of its divisors is an integer number (532569122735).

Almost surely, 2^{2212210202121} is an apocalyptic number.

It is an amenable number.

2212210202121 is a deficient number, since it is larger than the sum of its proper divisors (983204534289).

2212210202121 is a wasteful number, since it uses less digits than its factorization.

2212210202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245801133575 (or 245801133572 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2212210202121 its reverse (1212020122122), we get a palindrome (3424230324243).

The spelling of 2212210202121 in words is "two trillion, two hundred twelve billion, two hundred ten million, two hundred two thousand, one hundred twenty-one".