20121121601010 has 48 divisors (see below), whose sum is σ = 52803840638016. Its totient is φ = 5315486326944.

The previous prime is 20121121601003. The next prime is 20121121601017. The reversal of 20121121601010 is 1010612112102.

20121121601010 is a `hidden beast` number, since 20 + 1 + 2 + 11 + 21 + 601 + 0 + 10 = 666.

It is an interprime number because it is at equal distance from previous prime (20121121601003) and next prime (20121121601017).

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

It is not an unprimeable number, because it can be changed into a prime (20121121601017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1044700734 + ... + 1044719993.

It is an arithmetic number, because the mean of its divisors is an integer number (1100080013292).

Almost surely, 2^{20121121601010} is an apocalyptic number.

20121121601010 is an abundant number, since it is smaller than the sum of its proper divisors (32682719037006).

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

20121121601010 is a wasteful number, since it uses less digits than its factorization.

20121121601010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089420847 (or 2089420844 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 20121121601010 its reverse (1010612112102), we get a palindrome (21131733713112).

The spelling of 20121121601010 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-one million, six hundred one thousand, ten".