1221000201011 has 8 divisors (see below), whose sum is σ = 1222413032880. Its totient is φ = 1219587517728.

The previous prime is 1221000200993. The next prime is 1221000201053. The reversal of 1221000201011 is 1101020001221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221000201011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221000200983 and 1221000201001.

It is not an unprimeable number, because it can be changed into a prime (1221000206011) 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, 32877425 + ... + 32914541.

It is an arithmetic number, because the mean of its divisors is an integer number (152801629110).

Almost surely, 2^{1221000201011} is an apocalyptic number.

1221000201011 is a deficient number, since it is larger than the sum of its proper divisors (1412831869).

1221000201011 is an equidigital number, since it uses as much as digits as its factorization.

1221000201011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74293.

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

Adding to 1221000201011 its reverse (1101020001221), we get a palindrome (2322020202232).

The spelling of 1221000201011 in words is "one trillion, two hundred twenty-one billion, two hundred one thousand, eleven".