1010021001021 has 8 divisors (see below), whose sum is σ = 1496327408960. Its totient is φ = 673347333996.

The previous prime is 1010021001013. The next prime is 1010021001097. The reversal of 1010021001021 is 1201001200101.

It is a happy number.

It is not a de Polignac number, because 1010021001021 - 2³ = 1010021001013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010021000994 and 1010021001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010021001221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18704092585 + ... + 18704092638.

It is an arithmetic number, because the mean of its divisors is an integer number (187040926120).

Almost surely, 2^{1010021001021} is an apocalyptic number.

It is an amenable number.

1010021001021 is a deficient number, since it is larger than the sum of its proper divisors (486306407939).

1010021001021 is an equidigital number, since it uses as much as digits as its factorization.

1010021001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37408185232 (or 37408185226 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1010021001021 its reverse (1201001200101), we get a palindrome (2211022201122).

The spelling of 1010021001021 in words is "one trillion, ten billion, twenty-one million, one thousand, twenty-one".