1020111001 has 8 divisors (see below), whose sum is σ = 1255521344. Its totient is φ = 807120720.

The previous prime is 1020110951. The next prime is 1020111011. The reversal of 1020111001 is 1001110201.

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

It is not a de Polignac number, because 1020111001 - 2²⁵ = 986556569 is a prime.

It is a super-2 number, since 2×1020111001² = 2081252908722444002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is not an unprimeable number, because it can be changed into a prime (1020111011) 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, 5604915 + ... + 5605096.

It is an arithmetic number, because the mean of its divisors is an integer number (156940168).

Almost surely, 2^1020111001 is an apocalyptic number.

It is an amenable number.

1020111001 is a deficient number, since it is larger than the sum of its proper divisors (235410343).

1020111001 is a wasteful number, since it uses less digits than its factorization.

1020111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11210031.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1020111001 is about 31939.1765861301. The cubic root of 1020111001 is about 1006.6592233099.

Adding to 1020111001 its reverse (1001110201), we get a palindrome (2021221202).

The spelling of 1020111001 in words is "one billion, twenty million, one hundred eleven thousand, one".