30122121312 has 72 divisors (see below), whose sum is σ = 86234803200. Its totient is φ = 9973305600.

The previous prime is 30122121277. The next prime is 30122121329. The reversal of 30122121312 is 21312122103.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308064 + ... + 393887.

It is an arithmetic number, because the mean of its divisors is an integer number (1197705600).

Almost surely, 2^30122121312 is an apocalyptic number.

30122121312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30122121312 is an abundant number, since it is smaller than the sum of its proper divisors (56112681888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30122121312 is a wasteful number, since it uses less digits than its factorization.

30122121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702116 (or 702105 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 30122121312 its reverse (21312122103), we get a palindrome (51434243415).

The spelling of 30122121312 in words is "thirty billion, one hundred twenty-two million, one hundred twenty-one thousand, three hundred twelve".