2121670181748 has 48 divisors (see below), whose sum is σ = 5332347324416. Its totient is φ = 652702700160.

The previous prime is 2121670181737. The next prime is 2121670181753. The reversal of 2121670181748 is 8471810761212.

It is a junction number, because it is equal to n+sod(n) for n = 2121670181697 and 2121670181706.

It is a congruent number.

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, 377263 + ... + 2094198.

Almost surely, 2^{2121670181748} is an apocalyptic number.

It is an amenable number.

2121670181748 is an abundant number, since it is smaller than the sum of its proper divisors (3210677142668).

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

2121670181748 is a wasteful number, since it uses less digits than its factorization.

2121670181748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476984 (or 2476982 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 48.

The spelling of 2121670181748 in words is "two trillion, one hundred twenty-one billion, six hundred seventy million, one hundred eighty-one thousand, seven hundred forty-eight".