1012100102021 has 4 divisors (see below), whose sum is σ = 1012142853792. Its totient is φ = 1012057350252.

The previous prime is 1012100101963. The next prime is 1012100102089. The reversal of 1012100102021 is 1202010012101.

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 1012100102021 - 2²⁶ = 1012032993157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012100101993 and 1012100102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012100105021) 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, 21340355 + ... + 21387728.

It is an arithmetic number, because the mean of its divisors is an integer number (253035713448).

Almost surely, 2^{1012100102021} is an apocalyptic number.

It is an amenable number.

1012100102021 is a deficient number, since it is larger than the sum of its proper divisors (42751771).

1012100102021 is an equidigital number, since it uses as much as digits as its factorization.

1012100102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42751770.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1012100102021 its reverse (1202010012101), we get a palindrome (2214110114122).

The spelling of 1012100102021 in words is "one trillion, twelve billion, one hundred million, one hundred two thousand, twenty-one".