1222212012021 has 48 divisors (see below), whose sum is σ = 2370350586240. Its totient is φ = 586075685760.

The previous prime is 1222212011987. The next prime is 1222212012037. The reversal of 1222212012021 is 1202102122221.

It is a happy number.

It is not a de Polignac number, because 1222212012021 - 2⁹ = 1222212011509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222212011985 and 1222212012003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222212012821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67823826 + ... + 67841843.

It is an arithmetic number, because the mean of its divisors is an integer number (49382303880).

Almost surely, 2^{1222212012021} is an apocalyptic number.

1222212012021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222212012021 is a deficient number, since it is larger than the sum of its proper divisors (1148138574219).

1222212012021 is a wasteful number, since it uses less digits than its factorization.

1222212012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135665706 (or 135665703 counting only the distinct ones).

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

Adding to 1222212012021 its reverse (1202102122221), we get a palindrome (2424314134242).

The spelling of 1222212012021 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, twelve thousand, twenty-one".