1012020002021 has 48 divisors (see below), whose sum is σ = 1227691080000. Its totient is φ = 830771746560.

The previous prime is 1012020002017. The next prime is 1012020002083. The reversal of 1012020002021 is 1202000202101.

It is a happy number.

It is not a de Polignac number, because 1012020002021 - 2² = 1012020002017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1012020001993 and 1012020002011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012020002821) 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 47 ways as a sum of consecutive naturals, for example, 414591161 + ... + 414593601.

It is an arithmetic number, because the mean of its divisors is an integer number (25576897500).

Almost surely, 2^{1012020002021} is an apocalyptic number.

It is an amenable number.

1012020002021 is a deficient number, since it is larger than the sum of its proper divisors (215671077979).

1012020002021 is a wasteful number, since it uses less digits than its factorization.

1012020002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4722 (or 4715 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1012020002021 its reverse (1202000202101), we get a palindrome (2214020204122).

The spelling of 1012020002021 in words is "one trillion, twelve billion, twenty million, two thousand, twenty-one".