1212002121111 has 8 divisors (see below), whose sum is σ = 1616063430000. Its totient is φ = 807971113152.

The previous prime is 1212002121103. The next prime is 1212002121119. The reversal of 1212002121111 is 1111212002121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1212002121103) and next prime (1212002121119).

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

It is not a de Polignac number, because 1212002121111 - 2³ = 1212002121103 is a prime.

It is a super-2 number, since 2×1212002121111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212002121119) 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, 7481736 + ... + 7642013.

It is an arithmetic number, because the mean of its divisors is an integer number (202007928750).

Almost surely, 2^{1212002121111} is an apocalyptic number.

1212002121111 is a deficient number, since it is larger than the sum of its proper divisors (404061308889).

1212002121111 is a wasteful number, since it uses less digits than its factorization.

1212002121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15150465.

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

Adding to 1212002121111 its reverse (1111212002121), we get a palindrome (2323214123232).

It can be divided in two parts, 1212002121 and 111, that multiplied together give a palindrome (134532235431).

The spelling of 1212002121111 in words is "one trillion, two hundred twelve billion, two million, one hundred twenty-one thousand, one hundred eleven".