1220222101021 has 16 divisors (see below), whose sum is σ = 1587460036608. Its totient is φ = 909482310000.

The previous prime is 1220222100997. The next prime is 1220222101027. The reversal of 1220222101021 is 1201012220221.

It is a happy number.

It is not a de Polignac number, because 1220222101021 - 2¹⁹ = 1220221576733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220222100986 and 1220222101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220222101027) 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, 344499105 + ... + 344502646.

It is an arithmetic number, because the mean of its divisors is an integer number (99216252288).

Almost surely, 2^{1220222101021} is an apocalyptic number.

1220222101021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220222101021 is a deficient number, since it is larger than the sum of its proper divisors (367237935587).

1220222101021 is a wasteful number, since it uses less digits than its factorization.

1220222101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689001792.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220222101021 its reverse (1201012220221), we get a palindrome (2421234321242).

The spelling of 1220222101021 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, one hundred one thousand, twenty-one".