1212211220022 has 72 divisors (see below), whose sum is σ = 2944758667032. Its totient is φ = 357408633600.

The previous prime is 1212211219981. The next prime is 1212211220029. The reversal of 1212211220022 is 2200221122121.

It is a happy number.

1212211220022 is a `hidden beast` number, since 1 + 212 + 211 + 220 + 0 + 22 = 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 = 1212211219977 and 1212211220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212211220029) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1964979 + ... + 2507102.

It is an arithmetic number, because the mean of its divisors is an integer number (40899425931).

Almost surely, 2^{1212211220022} is an apocalyptic number.

1212211220022 is an abundant number, since it is smaller than the sum of its proper divisors (1732547447010).

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

1212211220022 is a wasteful number, since it uses less digits than its factorization.

1212211220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4472174 (or 4472134 counting only the distinct ones).

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

Adding to 1212211220022 its reverse (2200221122121), we get a palindrome (3412432342143).

The spelling of 1212211220022 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred twenty thousand, twenty-two".