1020222211221 has 40 divisors (see below), whose sum is σ = 1576753516800. Its totient is φ = 656626068000.

The previous prime is 1020222211201. The next prime is 1020222211231. The reversal of 1020222211221 is 1221122220201.

It is a happy number.

1020222211221 is a `hidden beast` number, since 10 + 2 + 0 + 222 + 211 + 221 = 666.

It is not a de Polignac number, because 1020222211221 - 2¹³ = 1020222203029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020222211194 and 1020222211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020222211201) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 32116096 + ... + 32147846.

It is an arithmetic number, because the mean of its divisors is an integer number (39418837920).

Almost surely, 2^{1020222211221} is an apocalyptic number.

It is an amenable number.

1020222211221 is a deficient number, since it is larger than the sum of its proper divisors (556531305579).

1020222211221 is a wasteful number, since it uses less digits than its factorization.

1020222211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45471 (or 45462 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1020222211221 its reverse (1221122220201), we get a palindrome (2241344431422).

The spelling of 1020222211221 in words is "one trillion, twenty billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twenty-one".