202120122212011 has 4 divisors (see below), whose sum is σ = 202418674830432. Its totient is φ = 201821569593592.

The previous prime is 202120122211949. The next prime is 202120122212023. The reversal of 202120122212011 is 110212221021202.

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

It is a cyclic number.

It is not a de Polignac number, because 202120122212011 - 2¹⁹ = 202120121687723 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 202120122212011.

It is not an unprimeable number, because it can be changed into a prime (202120122212111) 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, 149276308195 + ... + 149276309548.

It is an arithmetic number, because the mean of its divisors is an integer number (50604668707608).

Almost surely, 2^{202120122212011} is an apocalyptic number.

202120122212011 is a deficient number, since it is larger than the sum of its proper divisors (298552618421).

202120122212011 is an equidigital number, since it uses as much as digits as its factorization.

202120122212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298552618420.

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

Adding to 202120122212011 its reverse (110212221021202), we get a palindrome (312332343233213).

The spelling of 202120122212011 in words is "two hundred two trillion, one hundred twenty billion, one hundred twenty-two million, two hundred twelve thousand, eleven".