2121221999934 has 48 divisors (see below), whose sum is σ = 4874220344448. Its totient is φ = 664402776576.

The previous prime is 2121221999933. The next prime is 2121222000067. The reversal of 2121221999934 is 4399991221212.

It is a happy number.

2121221999934 is a `hidden beast` number, since 212 + 1 + 221 + 99 + 99 + 34 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121221999933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5428782 + ... + 5806385.

It is an arithmetic number, because the mean of its divisors is an integer number (101546257176).

Almost surely, 2^{2121221999934} is an apocalyptic number.

2121221999934 is an abundant number, since it is smaller than the sum of its proper divisors (2752998344514).

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

2121221999934 is a wasteful number, since it uses less digits than its factorization.

2121221999934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11235809 (or 11235806 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The spelling of 2121221999934 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred thirty-four".