1220201021011 has 16 divisors (see below), whose sum is σ = 1475596431360. Its totient is φ = 985652262720.

The previous prime is 1220201021003. The next prime is 1220201021027. The reversal of 1220201021011 is 1101201020221.

It is not a de Polignac number, because 1220201021011 - 2³ = 1220201021003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220201020982 and 1220201021000.

It is not an unprimeable number, because it can be changed into a prime (1220201021071) 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, 23991466 + ... + 24042271.

It is an arithmetic number, because the mean of its divisors is an integer number (92224776960).

Almost surely, 2^{1220201021011} is an apocalyptic number.

1220201021011 is a deficient number, since it is larger than the sum of its proper divisors (255395410349).

1220201021011 is a wasteful number, since it uses less digits than its factorization.

1220201021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48033954.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220201021011 its reverse (1101201020221), we get a palindrome (2321402041232).

The spelling of 1220201021011 in words is "one trillion, two hundred twenty billion, two hundred one million, twenty-one thousand, eleven".