10211220121210 has 32 divisors (see below), whose sum is σ = 19461755595600. Its totient is φ = 3844150689792.

The previous prime is 10211220121181. The next prime is 10211220121247. The reversal of 10211220121210 is 1212102211201.

It can be written as a sum of positive squares in 8 ways, for example, as 6481041632521 + 3730178488689 = 2545789^2 + 1931367^2 .

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8812762 + ... + 9903898.

Almost surely, 2^{10211220121210} is an apocalyptic number.

10211220121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10211220121210 is a deficient number, since it is larger than the sum of its proper divisors (9250535474390).

10211220121210 is a wasteful number, since it uses less digits than its factorization.

10211220121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146210.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10211220121210 its reverse (1212102211201), we get a palindrome (11423322332411).

The spelling of 10211220121210 in words is "ten trillion, two hundred eleven billion, two hundred twenty million, one hundred twenty-one thousand, two hundred ten".