1011020020001 has 8 divisors (see below), whose sum is σ = 1013790393000. Its totient is φ = 1008249967872.

The previous prime is 1011020019973. The next prime is 1011020020009. The reversal of 1011020020001 is 1000200201101.

It can be written as a sum of positive squares in 4 ways, for example, as 247710267025 + 763309752976 = 497705^2 + 873676^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011020020001 - 2²² = 1011015825697 is a prime.

It is a super-2 number, since 2×1011020020001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011020020009) 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, 7109471 + ... + 7250283.

It is an arithmetic number, because the mean of its divisors is an integer number (126723799125).

Almost surely, 2^{1011020020001} is an apocalyptic number.

It is an amenable number.

1011020020001 is a deficient number, since it is larger than the sum of its proper divisors (2770372999).

1011020020001 is a wasteful number, since it uses less digits than its factorization.

1011020020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160435.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1011020020001 its reverse (1000200201101), we get a palindrome (2011220221102).

The spelling of 1011020020001 in words is "one trillion, eleven billion, twenty million, twenty thousand, one".