210211200020121 has 32 divisors (see below), whose sum is σ = 282008086437888. Its totient is φ = 139279759843200.

The previous prime is 210211200020093. The next prime is 210211200020131. The reversal of 210211200020121 is 121020002112012.

It is not a de Polignac number, because 210211200020121 - 2²² = 210211195825817 is a prime.

It is a super-2 number, since 2×210211200020121² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210211200020121.

It is not an unprimeable number, because it can be changed into a prime (210211200020131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5751156796 + ... + 5751193346.

It is an arithmetic number, because the mean of its divisors is an integer number (8812752701184).

Almost surely, 2^{210211200020121} is an apocalyptic number.

It is an amenable number.

210211200020121 is a deficient number, since it is larger than the sum of its proper divisors (71796886417767).

210211200020121 is a wasteful number, since it uses less digits than its factorization.

210211200020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51301.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210211200020121 its reverse (121020002112012), we get a palindrome (331231202132133).

The spelling of 210211200020121 in words is "two hundred ten trillion, two hundred eleven billion, two hundred million, twenty thousand, one hundred twenty-one".