200102100020121 has 64 divisors (see below), whose sum is σ = 300731995065600. Its totient is φ = 117549005967360.

The previous prime is 200102100020093. The next prime is 200102100020143. The reversal of 200102100020121 is 121020001201002.

It is not a de Polignac number, because 200102100020121 - 2¹⁷ = 200102099889049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200102100020097 and 200102100020106.

It is not an unprimeable number, because it can be changed into a prime (200102100020161) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9695061 + ... + 22230573.

It is an arithmetic number, because the mean of its divisors is an integer number (4698937422900).

Almost surely, 2^{200102100020121} is an apocalyptic number.

It is an amenable number.

200102100020121 is a deficient number, since it is larger than the sum of its proper divisors (100629895045479).

200102100020121 is a wasteful number, since it uses less digits than its factorization.

200102100020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12535786.

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

Adding to 200102100020121 its reverse (121020001201002), we get a palindrome (321122101221123).

The spelling of 200102100020121 in words is "two hundred trillion, one hundred two billion, one hundred million, twenty thousand, one hundred twenty-one".