1020011011021 has 16 divisors (see below), whose sum is σ = 1075342791168. Its totient is φ = 965602528000.

The previous prime is 1020011011003. The next prime is 1020011011057. The reversal of 1020011011021 is 1201101100201.

It is a cyclic number.

It is not a de Polignac number, because 1020011011021 - 2⁵ = 1020011010989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020011010989 and 1020011011007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020011011081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5594661 + ... + 5774101.

It is an arithmetic number, because the mean of its divisors is an integer number (67208924448).

Almost surely, 2^{1020011011021} is an apocalyptic number.

It is an amenable number.

1020011011021 is a deficient number, since it is larger than the sum of its proper divisors (55331780147).

1020011011021 is a wasteful number, since it uses less digits than its factorization.

1020011011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182012.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1020011011021 its reverse (1201101100201), we get a palindrome (2221112111222).

The spelling of 1020011011021 in words is "one trillion, twenty billion, eleven million, eleven thousand, twenty-one".