2211212020121 has 8 divisors (see below), whose sum is σ = 2463419227080. Its totient is φ = 1970735380992.

The previous prime is 2211212020103. The next prime is 2211212020123. The reversal of 2211212020121 is 1210202121122.

It can be written as a sum of positive squares in 4 ways, for example, as 59301990400 + 2151910029721 = 243520^2 + 1466939^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-2211212020121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2211212020121.

It is not an unprimeable number, because it can be changed into a prime (2211212020123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2932641560 + ... + 2932642313.

It is an arithmetic number, because the mean of its divisors is an integer number (307927403385).

Almost surely, 2^{2211212020121} is an apocalyptic number.

It is an amenable number.

2211212020121 is a deficient number, since it is larger than the sum of its proper divisors (252207206959).

2211212020121 is a wasteful number, since it uses less digits than its factorization.

2211212020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5865283915.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2211212020121 its reverse (1210202121122), we get a palindrome (3421414141243).

The spelling of 2211212020121 in words is "two trillion, two hundred eleven billion, two hundred twelve million, twenty thousand, one hundred twenty-one".