1021020012101 has 4 divisors (see below), whose sum is σ = 1021022081952. Its totient is φ = 1021017942252.

The previous prime is 1021020012083. The next prime is 1021020012139. The reversal of 1021020012101 is 1012100201201.

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 1021020012101 - 2²⁶ = 1020952903237 is a prime.

It is a super-2 number, since 2×1021020012101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021020012151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181886 + ... + 1440528.

It is an arithmetic number, because the mean of its divisors is an integer number (255255520488).

Almost surely, 2^{1021020012101} is an apocalyptic number.

It is an amenable number.

1021020012101 is a deficient number, since it is larger than the sum of its proper divisors (2069851).

1021020012101 is an equidigital number, since it uses as much as digits as its factorization.

1021020012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069850.

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

Adding to 1021020012101 its reverse (1012100201201), we get a palindrome (2033120213302).

The spelling of 1021020012101 in words is "one trillion, twenty-one billion, twenty million, twelve thousand, one hundred one".