1012010120021 has 4 divisors (see below), whose sum is σ = 1014767641152. Its totient is φ = 1009252598892.

The previous prime is 1012010119993. The next prime is 1012010120029. The reversal of 1012010120021 is 1200210102101.

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 1012010120021 - 2¹⁸ = 1012009857877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1012010119984 and 1012010120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012010120029) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1378760015 + ... + 1378760748.

It is an arithmetic number, because the mean of its divisors is an integer number (253691910288).

Almost surely, 2^{1012010120021} is an apocalyptic number.

It is an amenable number.

1012010120021 is a deficient number, since it is larger than the sum of its proper divisors (2757521131).

1012010120021 is an equidigital number, since it uses as much as digits as its factorization.

1012010120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2757521130.

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

Adding to 1012010120021 its reverse (1200210102101), we get a palindrome (2212220222122).

The spelling of 1012010120021 in words is "one trillion, twelve billion, ten million, one hundred twenty thousand, twenty-one".