2100021220012 has 24 divisors (see below), whose sum is σ = 3801957037200. Its totient is φ = 1013751485376.

The previous prime is 2100021219979. The next prime is 2100021220043. The reversal of 2100021220012 is 2100221200012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2100021219974 and 2100021220001.

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, 1864498 + ... + 2770630.

It is an arithmetic number, because the mean of its divisors is an integer number (158414876550).

Almost surely, 2^{2100021220012} is an apocalyptic number.

It is an amenable number.

2100021220012 is a deficient number, since it is larger than the sum of its proper divisors (1701935817188).

2100021220012 is a wasteful number, since it uses less digits than its factorization.

2100021220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926145 (or 926143 counting only the distinct ones).

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

Adding to 2100021220012 its reverse (2100221200012), we get a palindrome (4200242420024).

The spelling of 2100021220012 in words is "two trillion, one hundred billion, twenty-one million, two hundred twenty thousand, twelve".