1212211011021 has 8 divisors (see below), whose sum is σ = 1616296933920. Its totient is φ = 808132881072.

The previous prime is 1212211011017. The next prime is 1212211011029. The reversal of 1212211011021 is 1201101122121.

It is a happy number.

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

It is not a de Polignac number, because 1212211011021 - 2² = 1212211011017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212211011029) 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, 1575070 + ... + 2214783.

It is an arithmetic number, because the mean of its divisors is an integer number (202037116740).

Almost surely, 2^{1212211011021} is an apocalyptic number.

It is an amenable number.

1212211011021 is a deficient number, since it is larger than the sum of its proper divisors (404085922899).

1212211011021 is a wasteful number, since it uses less digits than its factorization.

1212211011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3896475.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212211011021 its reverse (1201101122121), we get a palindrome (2413312133142).

The spelling of 1212211011021 in words is "one trillion, two hundred twelve billion, two hundred eleven million, eleven thousand, twenty-one".