1428121213570 has 16 divisors (see below), whose sum is σ = 2721831019128. Its totient is φ = 537645633280.

The previous prime is 1428121213567. The next prime is 1428121213583. The reversal of 1428121213570 is 753121218241.

It can be written as a sum of positive squares in 4 ways, for example, as 888605990281 + 539515223289 = 942659^2 + 734517^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4200356341 + ... + 4200356680.

Almost surely, 2^{1428121213570} is an apocalyptic number.

1428121213570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1428121213570 is a deficient number, since it is larger than the sum of its proper divisors (1293709805558).

1428121213570 is a wasteful number, since it uses less digits than its factorization.

1428121213570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8400713045.

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 1428121213570 in words is "one trillion, four hundred twenty-eight billion, one hundred twenty-one million, two hundred thirteen thousand, five hundred seventy".