242121777 has 16 divisors (see below), whose sum is σ = 332344320. Its totient is φ = 156702672.

The previous prime is 242121751. The next prime is 242121787. The reversal of 242121777 is 777121242.

It is not a de Polignac number, because 242121777 - 2¹⁵ = 242089009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242121787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15924 + ... + 27162.

It is an arithmetic number, because the mean of its divisors is an integer number (20771520).

Almost surely, 2^242121777 is an apocalyptic number.

It is an amenable number.

242121777 is a deficient number, since it is larger than the sum of its proper divisors (90222543).

242121777 is a wasteful number, since it uses less digits than its factorization.

242121777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11452.

The product of its digits is 10976, while the sum is 33.

The square root of 242121777 is about 15560.2627548509. The cubic root of 242121777 is about 623.2724791809.

The spelling of 242121777 in words is "two hundred forty-two million, one hundred twenty-one thousand, seven hundred seventy-seven".