1210221211001 has 8 divisors (see below), whose sum is σ = 1320251560704. Its totient is φ = 1100192567920.

The previous prime is 1210221210943. The next prime is 1210221211021. The reversal of 1210221211001 is 1001121220121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1210221211001 - 2²⁶ = 1210154102137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210221211021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1393835 + ... + 2088831.

It is an arithmetic number, because the mean of its divisors is an integer number (165031445088).

Almost surely, 2^{1210221211001} is an apocalyptic number.

1210221211001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210221211001 is a deficient number, since it is larger than the sum of its proper divisors (110030349703).

1210221211001 is a wasteful number, since it uses less digits than its factorization.

1210221211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853311.

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

Adding to 1210221211001 its reverse (1001121220121), we get a palindrome (2211342431122).

The spelling of 1210221211001 in words is "one trillion, two hundred ten billion, two hundred twenty-one million, two hundred eleven thousand, one".