1220021311011 has 8 divisors (see below), whose sum is σ = 1626703008960. Its totient is φ = 813343576872.

The previous prime is 1220021310979. The next prime is 1220021311051. The reversal of 1220021311011 is 1101131200221.

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

It is not a de Polignac number, because 1220021311011 - 2⁵ = 1220021310979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220021311051) 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, 177345 + ... + 1572098.

It is an arithmetic number, because the mean of its divisors is an integer number (203337876120).

Almost surely, 2^{1220021311011} is an apocalyptic number.

1220021311011 is a deficient number, since it is larger than the sum of its proper divisors (406681697949).

1220021311011 is a wasteful number, since it uses less digits than its factorization.

1220021311011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981905.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1220021311011 its reverse (1101131200221), we get a palindrome (2321152511232).

The spelling of 1220021311011 in words is "one trillion, two hundred twenty billion, twenty-one million, three hundred eleven thousand, eleven".