1221140013 has 8 divisors (see below), whose sum is σ = 1713880800. Its totient is φ = 771246288.

The previous prime is 1221140009. The next prime is 1221140017. The reversal of 1221140013 is 3100411221.

It is an interprime number because it is at equal distance from previous prime (1221140009) and next prime (1221140017).

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

It is not a de Polignac number, because 1221140013 - 2² = 1221140009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221139974 and 1221140001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221140017) 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, 10711698 + ... + 10711811.

It is an arithmetic number, because the mean of its divisors is an integer number (214235100).

Almost surely, 2^1221140013 is an apocalyptic number.

It is an amenable number.

1221140013 is a deficient number, since it is larger than the sum of its proper divisors (492740787).

1221140013 is a wasteful number, since it uses less digits than its factorization.

1221140013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21423531.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1221140013 is about 34944.8138212239. The cubic root of 1221140013 is about 1068.8624510658.

Adding to 1221140013 its reverse (3100411221), we get a palindrome (4321551234).

The spelling of 1221140013 in words is "one billion, two hundred twenty-one million, one hundred forty thousand, thirteen".