1220001021011 has 2 divisors, whose sum is σ = 1220001021012. Its totient is φ = 1220001021010.

The previous prime is 1220001020977. The next prime is 1220001021023. The reversal of 1220001021011 is 1101201000221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220001021011 - 2²² = 1219996826707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220001020983 and 1220001021001.

It is not a weakly prime, because it can be changed into another prime (1220001021061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610000510505 + 610000510506.

It is an arithmetic number, because the mean of its divisors is an integer number (610000510506).

Almost surely, 2^{1220001021011} is an apocalyptic number.

1220001021011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220001021011 is an equidigital number, since it uses as much as digits as its factorization.

1220001021011 is an evil number, because the sum of its binary digits is even.

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

Adding to 1220001021011 its reverse (1101201000221), we get a palindrome (2321202021232).

The spelling of 1220001021011 in words is "one trillion, two hundred twenty billion, one million, twenty-one thousand, eleven".