1210211220001 has 16 divisors (see below), whose sum is σ = 1385588300800. Its totient is φ = 1035457205328.

The previous prime is 1210211219963. The next prime is 1210211220047. The reversal of 1210211220001 is 1000221120121.

It is not a de Polignac number, because 1210211220001 - 2⁹ = 1210211219489 is a prime.

It is a super-2 number, since 2×1210211220001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210211229001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26681620 + ... + 26726938.

It is an arithmetic number, because the mean of its divisors is an integer number (86599268800).

Almost surely, 2^{1210211220001} is an apocalyptic number.

It is an amenable number.

1210211220001 is a deficient number, since it is larger than the sum of its proper divisors (175377080799).

1210211220001 is an equidigital number, since it uses as much as digits as its factorization.

1210211220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52108.

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

Adding to 1210211220001 its reverse (1000221120121), we get a palindrome (2210432340122).

The spelling of 1210211220001 in words is "one trillion, two hundred ten billion, two hundred eleven million, two hundred twenty thousand, one".