10011020001021 has 24 divisors (see below), whose sum is σ = 15579436710656. Its totient is φ = 6157961742240.

The previous prime is 10011020000977. The next prime is 10011020001061. The reversal of 10011020001021 is 12010002011001.

It is a happy number.

It is not a de Polignac number, because 10011020001021 - 2¹⁸ = 10011019738877 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 10011020000994 and 10011020001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011020001061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18242005 + ... + 18782778.

Almost surely, 2^{10011020001021} is an apocalyptic number.

It is an amenable number.

10011020001021 is a deficient number, since it is larger than the sum of its proper divisors (5568416709635).

10011020001021 is a wasteful number, since it uses less digits than its factorization.

10011020001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37027113 (or 37027110 counting only the distinct ones).

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

Adding to 10011020001021 its reverse (12010002011001), we get a palindrome (22021022012022).

The spelling of 10011020001021 in words is "ten trillion, eleven billion, twenty million, one thousand, twenty-one".