30420120212 has 24 divisors (see below), whose sum is σ = 56387811816. Its totient is φ = 14309987328.

The previous prime is 30420120149. The next prime is 30420120271. The reversal of 30420120212 is 21202102403.

It can be written as a sum of positive squares in 4 ways, for example, as 15758785156 + 14661335056 = 125534^2 + 121084^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102038 + ... + 266930.

It is an arithmetic number, because the mean of its divisors is an integer number (2349492159).

Almost surely, 2^30420120212 is an apocalyptic number.

It is an amenable number.

30420120212 is a deficient number, since it is larger than the sum of its proper divisors (25967691604).

30420120212 is a wasteful number, since it uses less digits than its factorization.

30420120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167627 (or 167625 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 30420120212 its reverse (21202102403), we get a palindrome (51622222615).

The spelling of 30420120212 in words is "thirty billion, four hundred twenty million, one hundred twenty thousand, two hundred twelve".