221421330077426 has 8 divisors (see below), whose sum is σ = 332152914228780. Its totient is φ = 110703692001168.

The previous prime is 221421330077323. The next prime is 221421330077443. The reversal of 221421330077426 is 624770033124122.

It can be written as a sum of positive squares in 2 ways, for example, as 186605134801801 + 34816195275625 = 13660349^2 + 5900525^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3486479081 + ... + 3486542588.

Almost surely, 2^{221421330077426} is an apocalyptic number.

221421330077426 is a deficient number, since it is larger than the sum of its proper divisors (110731584151354).

221421330077426 is a wasteful number, since it uses less digits than its factorization.

221421330077426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6973037548.

The product of its (nonzero) digits is 677376, while the sum is 44.

The spelling of 221421330077426 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, three hundred thirty million, seventy-seven thousand, four hundred twenty-six".