2121626426136 has 128 divisors (see below), whose sum is σ = 6381510720000. Its totient is φ = 574213681152.

The previous prime is 2121626426107. The next prime is 2121626426147. The reversal of 2121626426136 is 6316246261212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35557800 + ... + 35617416.

It is an arithmetic number, because the mean of its divisors is an integer number (49855552500).

Almost surely, 2^{2121626426136} is an apocalyptic number.

It is an amenable number.

2121626426136 is an abundant number, since it is smaller than the sum of its proper divisors (4259884293864).

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

2121626426136 is a wasteful number, since it uses less digits than its factorization.

2121626426136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70801 (or 70797 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The spelling of 2121626426136 in words is "two trillion, one hundred twenty-one billion, six hundred twenty-six million, four hundred twenty-six thousand, one hundred thirty-six".