30121231232 has 64 divisors (see below), whose sum is σ = 61156996800. Its totient is φ = 14774482944.

The previous prime is 30121231213. The next prime is 30121231249. The reversal of 30121231232 is 23213212103.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×30121231232² (a number of 22 digits) contains 22 as substring.

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, 1578098 + ... + 1597070.

It is an arithmetic number, because the mean of its divisors is an integer number (955578075).

Almost surely, 2^30121231232 is an apocalyptic number.

30121231232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30121231232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30578498400).

30121231232 is an abundant number, since it is smaller than the sum of its proper divisors (31035765568).

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

30121231232 is a wasteful number, since it uses less digits than its factorization.

30121231232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19223 (or 19211 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 30121231232 its reverse (23213212103), we get a palindrome (53334443335).

The spelling of 30121231232 in words is "thirty billion, one hundred twenty-one million, two hundred thirty-one thousand, two hundred thirty-two".