210121110020211 has 16 divisors (see below), whose sum is σ = 304088051011584. Its totient is φ = 128287146514464.

The previous prime is 210121110020153. The next prime is 210121110020273. The reversal of 210121110020211 is 112020011121012.

It is a happy number.

It is not a de Polignac number, because 210121110020211 - 2¹³ = 210121110012019 is a prime.

It is a super-2 number, since 2×210121110020211² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (210121110120211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21211494141 + ... + 21211504046.

It is an arithmetic number, because the mean of its divisors is an integer number (19005503188224).

Almost surely, 2^{210121110020211} is an apocalyptic number.

210121110020211 is a deficient number, since it is larger than the sum of its proper divisors (93966940991373).

210121110020211 is a wasteful number, since it uses less digits than its factorization.

210121110020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42422998330.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210121110020211 its reverse (112020011121012), we get a palindrome (322141121141223).

The spelling of 210121110020211 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred ten million, twenty thousand, two hundred eleven".