210121010022001 has 6 divisors (see below), whose sum is σ = 227527484225190. Its totient is φ = 193957855404768.

The previous prime is 210121010021959. The next prime is 210121010022019. The reversal of 210121010022001 is 100220010121012.

210121010022001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 361519600225 + 209759490421776 = 601265^2 + 14483076^2 .

It is a de Polignac number, because none of the positive numbers 2^k-210121010022001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210121010082001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 621659792796 + ... + 621659793133.

It is an arithmetic number, because the mean of its divisors is an integer number (37921247370865).

Almost surely, 2^{210121010022001} is an apocalyptic number.

It is an amenable number.

210121010022001 is a deficient number, since it is larger than the sum of its proper divisors (17406474203189).

210121010022001 is a wasteful number, since it uses less digits than its factorization.

210121010022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243319585955 (or 1243319585942 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210121010022001 its reverse (100220010121012), we get a palindrome (310341020143013).

The spelling of 210121010022001 in words is "two hundred ten trillion, one hundred twenty-one billion, ten million, twenty-two thousand, one".