1211012210 has 32 divisors (see below), whose sum is σ = 2281872384. Its totient is φ = 462168000.

The previous prime is 1211012207. The next prime is 1211012213. The reversal of 1211012210 is 122101121.

It is an interprime number because it is at equal distance from previous prime (1211012207) and next prime (1211012213).

It is a junction number, because it is equal to n+sod(n) for n = 1211012191 and 1211012200.

It is not an unprimeable number, because it can be changed into a prime (1211012213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5501 + ... + 49520.

It is an arithmetic number, because the mean of its divisors is an integer number (71308512).

Almost surely, 2^1211012210 is an apocalyptic number.

1211012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211012210 is a deficient number, since it is larger than the sum of its proper divisors (1070860174).

1211012210 is a wasteful number, since it uses less digits than its factorization.

1211012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55130.

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

The square root of 1211012210 is about 34799.6007161002. The cubic root of 1211012210 is about 1065.8992925829.

Adding to 1211012210 its reverse (122101121), we get a palindrome (1333113331).

The spelling of 1211012210 in words is "one billion, two hundred eleven million, twelve thousand, two hundred ten".