1210212211 has 12 divisors (see below), whose sum is σ = 1342436760. Its totient is φ = 1089865920.

The previous prime is 1210212203. The next prime is 1210212217. The reversal of 1210212211 is 1122120121.

It is not a de Polignac number, because 1210212211 - 2³ = 1210212203 is a prime.

It is a super-2 number, since 2×1210212211² = 2929227191307017042, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1210212191 and 1210212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210212217) 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, 80401 + ... + 94258.

It is an arithmetic number, because the mean of its divisors is an integer number (111869730).

Almost surely, 2^1210212211 is an apocalyptic number.

1210212211 is a deficient number, since it is larger than the sum of its proper divisors (132224549).

1210212211 is a wasteful number, since it uses less digits than its factorization.

1210212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174726 (or 174713 counting only the distinct ones).

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

The square root of 1210212211 is about 34788.1044467789. The cubic root of 1210212211 is about 1065.6645285842.

Adding to 1210212211 its reverse (1122120121), we get a palindrome (2332332332).

The spelling of 1210212211 in words is "one billion, two hundred ten million, two hundred twelve thousand, two hundred eleven".