1211222122001 has 8 divisors (see below), whose sum is σ = 1262854456320. Its totient is φ = 1160247524688.

The previous prime is 1211222121983. The next prime is 1211222122037. The reversal of 1211222122001 is 1002212221121.

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 1211222122001 - 2³⁴ = 1194042252817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211222122081) 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, 164430491 + ... + 164437856.

It is an arithmetic number, because the mean of its divisors is an integer number (157856807040).

Almost surely, 2^{1211222122001} is an apocalyptic number.

It is an amenable number.

1211222122001 is a deficient number, since it is larger than the sum of its proper divisors (51632334319).

1211222122001 is a wasteful number, since it uses less digits than its factorization.

1211222122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328868503.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1211222122001 its reverse (1002212221121), we get a palindrome (2213434343122).

The spelling of 1211222122001 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty-two thousand, one".