39220121 has 4 divisors (see below), whose sum is σ = 39358992. Its totient is φ = 39081252.

The previous prime is 39220081. The next prime is 39220127. The reversal of 39220121 is 12102293.

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.

It is a cyclic number.

It is not a de Polignac number, because 39220121 - 2¹⁸ = 38957977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39220093 and 39220102.

It is not an unprimeable number, because it can be changed into a prime (39220127) 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, 69011 + ... + 69576.

It is an arithmetic number, because the mean of its divisors is an integer number (9839748).

Almost surely, 2^39220121 is an apocalyptic number.

It is an amenable number.

39220121 is a deficient number, since it is larger than the sum of its proper divisors (138871).

39220121 is a wasteful number, since it uses less digits than its factorization.

39220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138870.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 39220121 is about 6262.5969852770. The cubic root of 39220121 is about 339.7579621113.

The spelling of 39220121 in words is "thirty-nine million, two hundred twenty thousand, one hundred twenty-one".