221051002 has 4 divisors (see below), whose sum is σ = 331576506. Its totient is φ = 110525500.

The previous prime is 221050981. The next prime is 221051009. The reversal of 221051002 is 200150122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 220789881 + 261121 = 14859^2 + 511^2 .

It is not an unprimeable number, because it can be changed into a prime (221051009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55262749 + ... + 55262752.

Almost surely, 2^221051002 is an apocalyptic number.

221051002 is a deficient number, since it is larger than the sum of its proper divisors (110525504).

221051002 is a wasteful number, since it uses less digits than its factorization.

221051002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110525503.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 221051002 is about 14867.7840312536. The cubic root of 221051002 is about 604.6408651062.

The spelling of 221051002 in words is "two hundred twenty-one million, fifty-one thousand, two".