20121001030 has 16 divisors (see below), whose sum is σ = 39003786864. Its totient is φ = 7429292640.

The previous prime is 20121001027. The next prime is 20121001031. The reversal of 20121001030 is 3010012102.

It is a super-2 number, since 2×20121001030² (a number of 21 digits) contains 22 as substring.

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 = 20121000998 and 20121001016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121001031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77388336 + ... + 77388595.

It is an arithmetic number, because the mean of its divisors is an integer number (2437736679).

Almost surely, 2^20121001030 is an apocalyptic number.

20121001030 is a deficient number, since it is larger than the sum of its proper divisors (18882785834).

20121001030 is a wasteful number, since it uses less digits than its factorization.

20121001030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154776951.

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

Adding to 20121001030 its reverse (3010012102), we get a palindrome (23131013132).

The spelling of 20121001030 in words is "twenty billion, one hundred twenty-one million, one thousand, thirty".