210102010101 has 12 divisors (see below), whose sum is σ = 303486581580. Its totient is φ = 140065283520.

The previous prime is 210102009967. The next prime is 210102010103. The reversal of 210102010101 is 101010201012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 179055922500 + 31046087601 = 423150^2 + 176199^2 .

It is not a de Polignac number, because 210102010101 - 2²⁵ = 210068455669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210102010103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334905 + ... + 729633.

It is an arithmetic number, because the mean of its divisors is an integer number (25290548465).

Almost surely, 2^210102010101 is an apocalyptic number.

It is an amenable number.

210102010101 is a deficient number, since it is larger than the sum of its proper divisors (93384571479).

210102010101 is a wasteful number, since it uses less digits than its factorization.

210102010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453876 (or 453873 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 210102010101 its reverse (101010201012), we get a palindrome (311112211113).

The spelling of 210102010101 in words is "two hundred ten billion, one hundred two million, ten thousand, one hundred one".