1211220020001 has 8 divisors (see below), whose sum is σ = 1615027359520. Its totient is φ = 807446346912.

The previous prime is 1211220019969. The next prime is 1211220020051. The reversal of 1211220020001 is 1000200221121.

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

It is not a de Polignac number, because 1211220020001 - 2⁵ = 1211220019969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211220020051) 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, 8332540 + ... + 8476653.

It is an arithmetic number, because the mean of its divisors is an integer number (201878419940).

Almost surely, 2^{1211220020001} is an apocalyptic number.

It is an amenable number.

1211220020001 is a deficient number, since it is larger than the sum of its proper divisors (403807339519).

1211220020001 is a wasteful number, since it uses less digits than its factorization.

1211220020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16833215.

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

Adding to 1211220020001 its reverse (1000200221121), we get a palindrome (2211420241122).

The spelling of 1211220020001 in words is "one trillion, two hundred eleven billion, two hundred twenty million, twenty thousand, one".