221113402 has 4 divisors (see below), whose sum is σ = 331670106. Its totient is φ = 110556700.

The previous prime is 221113397. The next prime is 221113433. The reversal of 221113402 is 204311122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204311122 = 2 ⋅102155561.

It can be written as a sum of positive squares in only one way, i.e., 198274561 + 22838841 = 14081^2 + 4779^2 .

It is a super-2 number, since 2×221113402² = 97782273088027208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55278349 + ... + 55278352.

Almost surely, 2^221113402 is an apocalyptic number.

221113402 is a deficient number, since it is larger than the sum of its proper divisors (110556704).

221113402 is a wasteful number, since it uses less digits than its factorization.

221113402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110556703.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 221113402 is about 14869.8823801670. The cubic root of 221113402 is about 604.6977539991.

Adding to 221113402 its reverse (204311122), we get a palindrome (425424524).

The spelling of 221113402 in words is "two hundred twenty-one million, one hundred thirteen thousand, four hundred two".