1220102021011 has 4 divisors (see below), whose sum is σ = 1273149934992. Its totient is φ = 1167054107032.

The previous prime is 1220102020999. The next prime is 1220102021053. The reversal of 1220102021011 is 1101202010221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220102021011 - 2¹⁹ = 1220101496723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220102020982 and 1220102021000.

It is not an unprimeable number, because it can be changed into a prime (1220102021081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26523956956 + ... + 26523957001.

It is an arithmetic number, because the mean of its divisors is an integer number (318287483748).

Almost surely, 2^{1220102021011} is an apocalyptic number.

1220102021011 is a deficient number, since it is larger than the sum of its proper divisors (53047913981).

1220102021011 is an equidigital number, since it uses as much as digits as its factorization.

1220102021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53047913980.

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

Adding to 1220102021011 its reverse (1101202010221), we get a palindrome (2321304031232).

The spelling of 1220102021011 in words is "one trillion, two hundred twenty billion, one hundred two million, twenty-one thousand, eleven".