20121000010 has 32 divisors (see below), whose sum is σ = 36492446592. Its totient is φ = 7987521600.

The previous prime is 20120999993. The next prime is 20121000013. The reversal of 20121000010 is 1000012102.

It is a junction number, because it is equal to n+sod(n) for n = 20120999957 and 20121000002.

It is not an unprimeable number, because it can be changed into a prime (20121000013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1081285 + ... + 1099735.

It is an arithmetic number, because the mean of its divisors is an integer number (1140388956).

Almost surely, 2^20121000010 is an apocalyptic number.

20121000010 is a deficient number, since it is larger than the sum of its proper divisors (16371446582).

20121000010 is a wasteful number, since it uses less digits than its factorization.

20121000010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19278.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20121000010 its reverse (1000012102), we get a palindrome (21121012112).

The spelling of 20121000010 in words is "twenty billion, one hundred twenty-one million, ten", and thus it is an aban number.