20012020121002 has 24 divisors (see below), whose sum is σ = 37605004845156. Its totient is φ = 7916843124288.

The previous prime is 20012020120999. The next prime is 20012020121087. The reversal of 20012020121002 is 20012102021002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18071434604601 + 1940585516401 = 4251051^2 + 1393049^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7854009763 + ... + 7854012310.

Almost surely, 2^{20012020121002} is an apocalyptic number.

20012020121002 is a deficient number, since it is larger than the sum of its proper divisors (17592984724154).

20012020121002 is a wasteful number, since it uses less digits than its factorization.

20012020121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15708022102 (or 15708022095 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20012020121002 its reverse (20012102021002), we get a palindrome (40024122142004).

The spelling of 20012020121002 in words is "twenty trillion, twelve billion, twenty million, one hundred twenty-one thousand, two".