10001211121210 has 16 divisors (see below), whose sum is σ = 18123000021000. Its totient is φ = 3973635558976.

The previous prime is 10001211121207. The next prime is 10001211121229. The reversal of 10001211121210 is 1212111210001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5087997524281 + 4913213596929 = 2255659^2 + 2216577^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3356109625 + ... + 3356112604.

Almost surely, 2^{10001211121210} is an apocalyptic number.

10001211121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10001211121210 is a deficient number, since it is larger than the sum of its proper divisors (8121788899790).

10001211121210 is a wasteful number, since it uses less digits than its factorization.

10001211121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6712222385.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10001211121210 its reverse (1212111210001), we get a palindrome (11213322331211).

The spelling of 10001211121210 in words is "ten trillion, one billion, two hundred eleven million, one hundred twenty-one thousand, two hundred ten".