2021011212222 has 24 divisors (see below), whose sum is σ = 4378948835976. Its totient is φ = 673656371856.

The previous prime is 2021011212203. The next prime is 2021011212223. The reversal of 2021011212222 is 2222121101202.

It is a happy number.

2021011212222 is a `hidden beast` number, since 20 + 210 + 1 + 1 + 212 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2021011212195 and 2021011212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021011212223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262168 + ... + 2027499.

It is an arithmetic number, because the mean of its divisors is an integer number (182456201499).

Almost surely, 2^{2021011212222} is an apocalyptic number.

2021011212222 is an abundant number, since it is smaller than the sum of its proper divisors (2357937623754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021011212222 is a wasteful number, since it uses less digits than its factorization.

2021011212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338712 (or 2338709 counting only the distinct ones).

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

Adding to 2021011212222 its reverse (2222121101202), we get a palindrome (4243132313424).

The spelling of 2021011212222 in words is "two trillion, twenty-one billion, eleven million, two hundred twelve thousand, two hundred twenty-two".