20102121210199 has 32 divisors (see below), whose sum is σ = 24734034170496. Its totient is φ = 15944533585920.

The previous prime is 20102121210121. The next prime is 20102121210251. The reversal of 20102121210199 is 99101212120102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102121210199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20102121210199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102121211199) 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, 17421547 + ... + 18539539.

It is an arithmetic number, because the mean of its divisors is an integer number (772938567828).

Almost surely, 2^{20102121210199} is an apocalyptic number.

20102121210199 is a deficient number, since it is larger than the sum of its proper divisors (4631912960297).

20102121210199 is a wasteful number, since it uses less digits than its factorization.

20102121210199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120555.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 20102121210199 in words is "twenty trillion, one hundred two billion, one hundred twenty-one million, two hundred ten thousand, one hundred ninety-nine".