1211020021210 has 16 divisors (see below), whose sum is σ = 2226215529216. Its totient is φ = 474101454928.

The previous prime is 1211020021193. The next prime is 1211020021219. The reversal of 1211020021210 is 121200201121.

It is not an unprimeable number, because it can be changed into a prime (1211020021219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1288318702 + ... + 1288319641.

It is an arithmetic number, because the mean of its divisors is an integer number (139138470576).

Almost surely, 2^{1211020021210} is an apocalyptic number.

1211020021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211020021210 is a deficient number, since it is larger than the sum of its proper divisors (1015195508006).

1211020021210 is a wasteful number, since it uses less digits than its factorization.

1211020021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576638397.

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

Adding to 1211020021210 its reverse (121200201121), we get a palindrome (1332220222331).

The spelling of 1211020021210 in words is "one trillion, two hundred eleven billion, twenty million, twenty-one thousand, two hundred ten".