1220001020011 has 16 divisors (see below), whose sum is σ = 1293944371200. Its totient is φ = 1146301365888.

The previous prime is 1220001020009. The next prime is 1220001020107. The reversal of 1220001020011 is 1100201000221.

It is a cyclic number.

It is not a de Polignac number, because 1220001020011 - 2¹ = 1220001020009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220001020011.

It is not an unprimeable number, because it can be changed into a prime (1220001020311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25110180 + ... + 25158718.

It is an arithmetic number, because the mean of its divisors is an integer number (80871523200).

Almost surely, 2^{1220001020011} is an apocalyptic number.

1220001020011 is a deficient number, since it is larger than the sum of its proper divisors (73943351189).

1220001020011 is a wasteful number, since it uses less digits than its factorization.

1220001020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51018.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1220001020011 its reverse (1100201000221), we get a palindrome (2320202020232).

The spelling of 1220001020011 in words is "one trillion, two hundred twenty billion, one million, twenty thousand, eleven".