1022212111221 has 32 divisors (see below), whose sum is σ = 1731767020800. Its totient is φ = 583771043520.

The previous prime is 1022212111183. The next prime is 1022212111243. The reversal of 1022212111221 is 1221112122201.

1022212111221 is a `hidden beast` number, since 10 + 2 + 221 + 211 + 1 + 221 = 666.

It is not a de Polignac number, because 1022212111221 - 2⁷ = 1022212111093 is a prime.

It is a super-2 number, since 2×1022212111221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1022212111194 and 1022212111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022212111321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1304850 + ... + 1935731.

It is an arithmetic number, because the mean of its divisors is an integer number (54117719400).

Almost surely, 2^{1022212111221} is an apocalyptic number.

It is an amenable number.

1022212111221 is a deficient number, since it is larger than the sum of its proper divisors (709554909579).

1022212111221 is a wasteful number, since it uses less digits than its factorization.

1022212111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3242266 (or 3242260 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1022212111221 its reverse (1221112122201), we get a palindrome (2243324233422).

The spelling of 1022212111221 in words is "one trillion, twenty-two billion, two hundred twelve million, one hundred eleven thousand, two hundred twenty-one".