1210212101 has 8 divisors (see below), whose sum is σ = 1389141120. Its totient is φ = 1032793488.

The previous prime is 1210212077. The next prime is 1210212109. The reversal of 1210212101 is 1012120121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1210212101 - 2⁶ = 1210212037 is a prime.

It is a super-2 number, since 2×1210212101² = 2929226658813668402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210212109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375881 + ... + 379086.

It is an arithmetic number, because the mean of its divisors is an integer number (173642640).

Almost surely, 2^1210212101 is an apocalyptic number.

It is an amenable number.

1210212101 is a deficient number, since it is larger than the sum of its proper divisors (178929019).

1210212101 is an equidigital number, since it uses as much as digits as its factorization.

1210212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755203.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1210212101 is about 34788.1028657787. The cubic root of 1210212101 is about 1065.6644962970.

Adding to 1210212101 its reverse (1012120121), we get a palindrome (2222332222).

The spelling of 1210212101 in words is "one billion, two hundred ten million, two hundred twelve thousand, one hundred one".