2121210000042 has 32 divisors (see below), whose sum is σ = 5133684707712. Its totient is φ = 570409411584.

The previous prime is 2121209999989. The next prime is 2121210000061. The reversal of 2121210000042 is 2400000121212.

It is a super-3 number, since 3×2121210000042³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121209999976 and 2121210000030.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1485440463 + ... + 1485441890.

It is an arithmetic number, because the mean of its divisors is an integer number (160427647116).

Almost surely, 2^{2121210000042} is an apocalyptic number.

2121210000042 is an abundant number, since it is smaller than the sum of its proper divisors (3012474707670).

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

2121210000042 is a wasteful number, since it uses less digits than its factorization.

2121210000042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970882382.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2121210000042 its reverse (2400000121212), we get a palindrome (4521210121254).

The spelling of 2121210000042 in words is "two trillion, one hundred twenty-one billion, two hundred ten million, forty-two", and thus it is an aban number.