1221111000201 has 8 divisors (see below), whose sum is σ = 1684291034880. Its totient is φ = 786002482832.

The previous prime is 1221111000173. The next prime is 1221111000211. The reversal of 1221111000201 is 1020001111221.

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 1221111000201 - 2⁵ = 1221111000169 is a prime.

It is a super-2 number, since 2×1221111000201² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1221111000211) 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, 7017879225 + ... + 7017879398.

It is an arithmetic number, because the mean of its divisors is an integer number (210536379360).

Almost surely, 2^{1221111000201} is an apocalyptic number.

It is an amenable number.

1221111000201 is a deficient number, since it is larger than the sum of its proper divisors (463180034679).

1221111000201 is a wasteful number, since it uses less digits than its factorization.

1221111000201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14035758655.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1221111000201 its reverse (1020001111221), we get a palindrome (2241112111422).

The spelling of 1221111000201 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, two hundred one", and thus it is an aban number.