2100001021012 has 6 divisors (see below), whose sum is σ = 3675001786778. Its totient is φ = 1050000510504.

The previous prime is 2100001020959. The next prime is 2100001021039. The reversal of 2100001021012 is 2101201000012.

It can be written as a sum of positive squares in only one way, i.e., 2035518544656 + 64482476356 = 1426716^2 + 253934^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2100001021012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262500127623 + ... + 262500127630.

Almost surely, 2^{2100001021012} is an apocalyptic number.

It is an amenable number.

2100001021012 is a deficient number, since it is larger than the sum of its proper divisors (1575000765766).

2100001021012 is a wasteful number, since it uses less digits than its factorization.

2100001021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525000255257 (or 525000255255 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2100001021012 its reverse (2101201000012), we get a palindrome (4201202021024).

The spelling of 2100001021012 in words is "two trillion, one hundred billion, one million, twenty-one thousand, twelve".