356012221 has 4 divisors (see below), whose sum is σ = 358573600. Its totient is φ = 353450844.

The previous prime is 356012201. The next prime is 356012227. The reversal of 356012221 is 122210653.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122210653 = 59 ⋅2071367.

It is a cyclic number.

It is not a de Polignac number, because 356012221 - 2⁹ = 356011709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 356012192 and 356012201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (356012227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280481 + ... + 1280758.

It is an arithmetic number, because the mean of its divisors is an integer number (89643400).

Almost surely, 2^356012221 is an apocalyptic number.

It is an amenable number.

356012221 is a deficient number, since it is larger than the sum of its proper divisors (2561379).

356012221 is a wasteful number, since it uses less digits than its factorization.

356012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561378.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 356012221 is about 18868.2861171862. The cubic root of 356012221 is about 708.7422160194.

Adding to 356012221 its reverse (122210653), we get a palindrome (478222874).

The spelling of 356012221 in words is "three hundred fifty-six million, twelve thousand, two hundred twenty-one".