210200000021121 has 32 divisors (see below), whose sum is σ = 309180530883456. Its totient is φ = 125965990080000.

The previous prime is 210200000020993. The next prime is 210200000021173. The reversal of 210200000021121 is 121120000002012.

It is not a de Polignac number, because 210200000021121 - 2⁷ = 210200000020993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210200000021097 and 210200000021106.

It is not an unprimeable number, because it can be changed into a prime (210200000021821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39132340 + ... + 44178501.

It is an arithmetic number, because the mean of its divisors is an integer number (9661891590108).

Almost surely, 2^{210200000021121} is an apocalyptic number.

It is an amenable number.

210200000021121 is a deficient number, since it is larger than the sum of its proper divisors (98980530862335).

210200000021121 is a wasteful number, since it uses less digits than its factorization.

210200000021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83311713.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210200000021121 its reverse (121120000002012), we get a palindrome (331320000023133).

The spelling of 210200000021121 in words is "two hundred ten trillion, two hundred billion, twenty-one thousand, one hundred twenty-one".