20120121124010 has 16 divisors (see below), whose sum is σ = 36216357731496. Its totient is φ = 8048017403328.

The previous prime is 20120121123989. The next prime is 20120121124091. The reversal of 20120121124010 is 1042112102102.

It can be written as a sum of positive squares in 4 ways, for example, as 18542678066641 + 1577443057369 = 4306121^2 + 1255963^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20120121124010.

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, 1061357 + ... + 6431696.

Almost surely, 2^{20120121124010} is an apocalyptic number.

20120121124010 is a deficient number, since it is larger than the sum of its proper divisors (16096236607486).

20120121124010 is a wasteful number, since it uses less digits than its factorization.

20120121124010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7761577.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20120121124010 its reverse (1042112102102), we get a palindrome (21162233226112).

The spelling of 20120121124010 in words is "twenty trillion, one hundred twenty billion, one hundred twenty-one million, one hundred twenty-four thousand, ten".