1211211220010 has 32 divisors (see below), whose sum is σ = 2378434968000. Its totient is φ = 440429967360.

The previous prime is 1211211219961. The next prime is 1211211220027. The reversal of 1211211220010 is 100221121121.

It is a super-2 number, since 2×1211211220010² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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, 5682341 + ... + 5891639.

It is an arithmetic number, because the mean of its divisors is an integer number (74326092750).

Almost surely, 2^{1211211220010} is an apocalyptic number.

1211211220010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211211220010 is a deficient number, since it is larger than the sum of its proper divisors (1167223747990).

1211211220010 is a wasteful number, since it uses less digits than its factorization.

1211211220010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261926.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211211220010 its reverse (100221121121), we get a palindrome (1311432341131).

The spelling of 1211211220010 in words is "one trillion, two hundred eleven billion, two hundred eleven million, two hundred twenty thousand, ten".