1221021341 has 8 divisors (see below), whose sum is σ = 1229952768. Its totient is φ = 1212120000.

The previous prime is 1221021337. The next prime is 1221021391. The reversal of 1221021341 is 1431201221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221021341 - 2² = 1221021337 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221021391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77396 + ... + 91826.

It is an arithmetic number, because the mean of its divisors is an integer number (153744096).

Almost surely, 2^1221021341 is an apocalyptic number.

It is an amenable number.

1221021341 is a deficient number, since it is larger than the sum of its proper divisors (8931427).

1221021341 is a wasteful number, since it uses less digits than its factorization.

1221021341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15043.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1221021341 is about 34943.1157883781. The cubic root of 1221021341 is about 1068.8278254556.

Adding to 1221021341 its reverse (1431201221), we get a palindrome (2652222562).

The spelling of 1221021341 in words is "one billion, two hundred twenty-one million, twenty-one thousand, three hundred forty-one".