30172121386 has 16 divisors (see below), whose sum is σ = 49415424768. Its totient is φ = 13702694400.

The previous prime is 30172121383. The next prime is 30172121389. The reversal of 30172121386 is 68312127103.

It is an interprime number because it is at equal distance from previous prime (30172121383) and next prime (30172121389).

It is not an unprimeable number, because it can be changed into a prime (30172121381) 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, 569370 + ... + 620101.

It is an arithmetic number, because the mean of its divisors is an integer number (3088464048).

Almost surely, 2^30172121386 is an apocalyptic number.

30172121386 is a deficient number, since it is larger than the sum of its proper divisors (19243303382).

30172121386 is a wasteful number, since it uses less digits than its factorization.

30172121386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190637.

The product of its (nonzero) digits is 12096, while the sum is 34.

Adding to 30172121386 its reverse (68312127103), we get a palindrome (98484248489).

The spelling of 30172121386 in words is "thirty billion, one hundred seventy-two million, one hundred twenty-one thousand, three hundred eighty-six".