2211212202121 has 8 divisors (see below), whose sum is σ = 2386276865280. Its totient is φ = 2036857741392.

The previous prime is 2211212202109. The next prime is 2211212202151. The reversal of 2211212202121 is 1212022121122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2211212202121 - 2²³ = 2211203813513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211212202151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177544135 + ... + 177556588.

It is an arithmetic number, because the mean of its divisors is an integer number (298284608160).

Almost surely, 2^{2211212202121} is an apocalyptic number.

It is an amenable number.

2211212202121 is a deficient number, since it is larger than the sum of its proper divisors (175064663159).

2211212202121 is a wasteful number, since it uses less digits than its factorization.

2211212202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355101215.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2211212202121 its reverse (1212022121122), we get a palindrome (3423234323243).

It can be divided in two parts, 221121 and 2202121, that added together give a palindrome (2423242).

The spelling of 2211212202121 in words is "two trillion, two hundred eleven billion, two hundred twelve million, two hundred two thousand, one hundred twenty-one".