30001211020 has 24 divisors (see below), whose sum is σ = 68730047568. Its totient is φ = 10909531200.

The previous prime is 30001211011. The next prime is 30001211021. The reversal of 30001211020 is 2011210003.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 30001210988 and 30001211006.

It is not an unprimeable number, because it can be changed into a prime (30001211021) 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, 68184351 + ... + 68184790.

It is an arithmetic number, because the mean of its divisors is an integer number (2863751982).

Almost surely, 2^30001211020 is an apocalyptic number.

It is an amenable number.

30001211020 is an abundant number, since it is smaller than the sum of its proper divisors (38728836548).

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

30001211020 is a wasteful number, since it uses less digits than its factorization.

30001211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136369161 (or 136369159 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 30001211020 its reverse (2011210003), we get a palindrome (32012421023).

The spelling of 30001211020 in words is "thirty billion, one million, two hundred eleven thousand, twenty".