1211002202001 has 16 divisors (see below), whose sum is σ = 1652276612096. Its totient is φ = 788532582096.

The previous prime is 1211002201967. The next prime is 1211002202021. The reversal of 1211002202001 is 1002022001121.

It is not a de Polignac number, because 1211002202001 - 2¹⁹ = 1211001677713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211002202021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4048476 + ... + 4337298.

It is an arithmetic number, because the mean of its divisors is an integer number (103267288256).

Almost surely, 2^{1211002202001} is an apocalyptic number.

It is an amenable number.

1211002202001 is a deficient number, since it is larger than the sum of its proper divisors (441274410095).

1211002202001 is a wasteful number, since it uses less digits than its factorization.

1211002202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321372.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1211002202001 its reverse (1002022001121), we get a palindrome (2213024203122).

The spelling of 1211002202001 in words is "one trillion, two hundred eleven billion, two million, two hundred two thousand, one".