2121015070427 has 4 divisors (see below), whose sum is σ = 2313834622296. Its totient is φ = 1928195518560.

The previous prime is 2121015070393. The next prime is 2121015070519. The reversal of 2121015070427 is 7240705101212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2121015070427 - 2²⁰ = 2121014021851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121015070393 and 2121015070402.

It is not an unprimeable number, because it can be changed into a prime (2121015070127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96409775918 + ... + 96409775939.

It is an arithmetic number, because the mean of its divisors is an integer number (578458655574).

Almost surely, 2^{2121015070427} is an apocalyptic number.

2121015070427 is a deficient number, since it is larger than the sum of its proper divisors (192819551869).

2121015070427 is a wasteful number, since it uses less digits than its factorization.

2121015070427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192819551868.

The product of its (nonzero) digits is 7840, while the sum is 32.

The spelling of 2121015070427 in words is "two trillion, one hundred twenty-one billion, fifteen million, seventy thousand, four hundred twenty-seven".