2111012001021 has 64 divisors (see below), whose sum is σ = 3588822835200. Its totient is φ = 1072027008000.

The previous prime is 2111012001011. The next prime is 2111012001023. The reversal of 2111012001021 is 1201002101112.

It is not a de Polignac number, because 2111012001021 - 2¹¹ = 2111011998973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2111012000988 and 2111012001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111012001023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1270485 + ... + 2415813.

It is an arithmetic number, because the mean of its divisors is an integer number (56075356800).

Almost surely, 2^{2111012001021} is an apocalyptic number.

2111012001021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2111012001021 is a deficient number, since it is larger than the sum of its proper divisors (1477810834179).

2111012001021 is a wasteful number, since it uses less digits than its factorization.

2111012001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145530.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2111012001021 its reverse (1201002101112), we get a palindrome (3312014102133).

It can be divided in two parts, 211101 and 2001021, that added together give a palindrome (2212122).

The spelling of 2111012001021 in words is "two trillion, one hundred eleven billion, twelve million, one thousand, twenty-one".