1021000202101 has 4 divisors (see below), whose sum is σ = 1113818402304. Its totient is φ = 928182001900.

The previous prime is 1021000202077. The next prime is 1021000202107. The reversal of 1021000202101 is 1012020001201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021000202101 - 2¹⁵ = 1021000169333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021000202107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46409100085 + ... + 46409100106.

It is an arithmetic number, because the mean of its divisors is an integer number (278454600576).

Almost surely, 2^{1021000202101} is an apocalyptic number.

1021000202101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021000202101 is a deficient number, since it is larger than the sum of its proper divisors (92818200203).

1021000202101 is an equidigital number, since it uses as much as digits as its factorization.

1021000202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92818200202.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1021000202101 its reverse (1012020001201), we get a palindrome (2033020203302).

The spelling of 1021000202101 in words is "one trillion, twenty-one billion, two hundred two thousand, one hundred one".