2101221042040 has 64 divisors (see below), whose sum is σ = 4986966528000. Its totient is φ = 794589724800.

The previous prime is 2101221041879. The next prime is 2101221042061. The reversal of 2101221042040 is 402401221012.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 2101221041999 and 2101221042017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2521936 + ... + 3250015.

It is an arithmetic number, because the mean of its divisors is an integer number (77921352000).

Almost surely, 2^{2101221042040} is an apocalyptic number.

2101221042040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101221042040 is an abundant number, since it is smaller than the sum of its proper divisors (2885745485960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2101221042040 is a wasteful number, since it uses less digits than its factorization.

2101221042040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5772460 (or 5772456 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2101221042040 its reverse (402401221012), we get a palindrome (2503622263052).

The spelling of 2101221042040 in words is "two trillion, one hundred one billion, two hundred twenty-one million, forty-two thousand, forty".