1212022021 has 8 divisors (see below), whose sum is σ = 1466648640. Its totient is φ = 977765568.

The previous prime is 1212022013. The next prime is 1212022111. The reversal of 1212022021 is 1202202121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212022021 - 2³ = 1212022013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212021992 and 1212022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212022001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5092411 + ... + 5092648.

It is an arithmetic number, because the mean of its divisors is an integer number (183331080).

Almost surely, 2^1212022021 is an apocalyptic number.

It is an amenable number.

1212022021 is a deficient number, since it is larger than the sum of its proper divisors (254626619).

1212022021 is a wasteful number, since it uses less digits than its factorization.

1212022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10185083.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1212022021 is about 34814.1066379708. The cubic root of 1212022021 is about 1066.1954794653.

Adding to 1212022021 its reverse (1202202121), we get a palindrome (2414224142).

The spelling of 1212022021 in words is "one billion, two hundred twelve million, twenty-two thousand, twenty-one".