1011101001020 has 72 divisors (see below), whose sum is σ = 2357949762672. Its totient is φ = 363882562560.

The previous prime is 1011101001017. The next prime is 1011101001037. The reversal of 1011101001020 is 201001011101.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1011101000989 and 1011101001007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1918922 + ... + 2388401.

Almost surely, 2^{1011101001020} is an apocalyptic number.

1011101001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011101001020 is an abundant number, since it is smaller than the sum of its proper divisors (1346848761652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1011101001020 is a wasteful number, since it uses less digits than its factorization.

1011101001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4307451 (or 4307438 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 1011101001020 its reverse (201001011101), we get a palindrome (1212102012121).

The spelling of 1011101001020 in words is "one trillion, eleven billion, one hundred one million, one thousand, twenty".