1210102101 has 24 divisors (see below), whose sum is σ = 1897226240. Its totient is φ = 738805536.

The previous prime is 1210102099. The next prime is 1210102121. The reversal of 1210102101 is 1012010121.

It is a happy number.

It is not a de Polignac number, because 1210102101 - 2¹ = 1210102099 is a prime.

It is a super-2 number, since 2×1210102101² = 2928694189689228402, which contains 22 as substring.

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 (1210102121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25861 + ... + 55578.

Almost surely, 2^1210102101 is an apocalyptic number.

It is an amenable number.

1210102101 is a deficient number, since it is larger than the sum of its proper divisors (687124139).

1210102101 is a wasteful number, since it uses less digits than its factorization.

1210102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81585 (or 81582 counting only the distinct ones).

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

The square root of 1210102101 is about 34786.5218295822. The cubic root of 1210102101 is about 1065.6322081148.

Adding to 1210102101 its reverse (1012010121), we get a palindrome (2222112222).

The spelling of 1210102101 in words is "one billion, two hundred ten million, one hundred two thousand, one hundred one".