211120220202121 has 4 divisors (see below), whose sum is σ = 211252418212612. Its totient is φ = 210988022191632.

The previous prime is 211120220201999. The next prime is 211120220202137. The reversal of 211120220202121 is 121202022021112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21278255962896 + 189841964239225 = 4612836^2 + 13778315^2 .

It is a cyclic number.

It is not a de Polignac number, because 211120220202121 - 2¹³ = 211120220193929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211120220202181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66099002850 + ... + 66099006043.

It is an arithmetic number, because the mean of its divisors is an integer number (52813104553153).

Almost surely, 2^{211120220202121} is an apocalyptic number.

It is an amenable number.

211120220202121 is a deficient number, since it is larger than the sum of its proper divisors (132198010491).

211120220202121 is a wasteful number, since it uses less digits than its factorization.

211120220202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132198010490.

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

Adding to 211120220202121 its reverse (121202022021112), we get a palindrome (332322242223233).

The spelling of 211120220202121 in words is "two hundred eleven trillion, one hundred twenty billion, two hundred twenty million, two hundred two thousand, one hundred twenty-one".