2021121020102 has 4 divisors (see below), whose sum is σ = 3031681530156. Its totient is φ = 1010560510050.

The previous prime is 2021121020081. The next prime is 2021121020119. The reversal of 2021121020102 is 2010201211202.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505280255024 + ... + 505280255027.

It is an arithmetic number, because the mean of its divisors is an integer number (757920382539).

Almost surely, 2^{2021121020102} is an apocalyptic number.

2021121020102 is a deficient number, since it is larger than the sum of its proper divisors (1010560510054).

2021121020102 is a wasteful number, since it uses less digits than its factorization.

2021121020102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010560510053.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2021121020102 its reverse (2010201211202), we get a palindrome (4031322231304).

The spelling of 2021121020102 in words is "two trillion, twenty-one billion, one hundred twenty-one million, twenty thousand, one hundred two".