2100205661070 has 64 divisors (see below), whose sum is σ = 5498978284800. Its totient is φ = 509116876800.

The previous prime is 2100205661069. The next prime is 2100205661077. The reversal of 2100205661070 is 701665020012.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100205661077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7484910 + ... + 7760430.

It is an arithmetic number, because the mean of its divisors is an integer number (85921535700).

Almost surely, 2^{2100205661070} is an apocalyptic number.

2100205661070 is an abundant number, since it is smaller than the sum of its proper divisors (3398772623730).

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

2100205661070 is a wasteful number, since it uses less digits than its factorization.

2100205661070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298641.

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 2100205661070 in words is "two trillion, one hundred billion, two hundred five million, six hundred sixty-one thousand, seventy".