1211022001001 has 8 divisors (see below), whose sum is σ = 1234059831360. Its totient is φ = 1187991146992.

The previous prime is 1211022000977. The next prime is 1211022001027. The reversal of 1211022001001 is 1001002201121.

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 1211022001001 - 2¹⁴ = 1211021984617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1211022001081) 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, 1392941 + ... + 2088618.

It is an arithmetic number, because the mean of its divisors is an integer number (154257478920).

Almost surely, 2^{1211022001001} is an apocalyptic number.

It is an amenable number.

1211022001001 is a deficient number, since it is larger than the sum of its proper divisors (23037830359).

1211022001001 is an equidigital number, since it uses as much as digits as its factorization.

1211022001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3488175.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1211022001001 its reverse (1001002201121), we get a palindrome (2212024202122).

The spelling of 1211022001001 in words is "one trillion, two hundred eleven billion, twenty-two million, one thousand, one".