2121357070064 has 20 divisors (see below), whose sum is σ = 4133090945160. Its totient is φ = 1054752955200.

The previous prime is 2121357070061. The next prime is 2121357070069. The reversal of 2121357070064 is 4600707531212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121357070061) 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, 370345787 + ... + 370351514.

It is an arithmetic number, because the mean of its divisors is an integer number (206654547258).

Almost surely, 2^{2121357070064} is an apocalyptic number.

It is an amenable number.

2121357070064 is a deficient number, since it is larger than the sum of its proper divisors (2011733875096).

2121357070064 is a wasteful number, since it uses less digits than its factorization.

2121357070064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740697488 (or 740697482 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 2121357070064 in words is "two trillion, one hundred twenty-one billion, three hundred fifty-seven million, seventy thousand, sixty-four".