210210220121011 has 4 divisors (see below), whose sum is σ = 229320240132024. Its totient is φ = 191100200110000.

The previous prime is 210210220120949. The next prime is 210210220121039. The reversal of 210210220121011 is 110121022012012.

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 210210220121011 - 2³¹ = 210208072637363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210210220121081) 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, 9555010005490 + ... + 9555010005511.

It is an arithmetic number, because the mean of its divisors is an integer number (57330060033006).

Almost surely, 2^{210210220121011} is an apocalyptic number.

210210220121011 is a deficient number, since it is larger than the sum of its proper divisors (19110020011013).

210210220121011 is a wasteful number, since it uses less digits than its factorization.

210210220121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19110020011012.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210210220121011 its reverse (110121022012012), we get a palindrome (320331242133023).

The spelling of 210210220121011 in words is "two hundred ten trillion, two hundred ten billion, two hundred twenty million, one hundred twenty-one thousand, eleven".