1011011201021 has 4 divisors (see below), whose sum is σ = 1035670010844. Its totient is φ = 986352391200.

The previous prime is 1011011200973. The next prime is 1011011201041. The reversal of 1011011201021 is 1201021101101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 460580752921 + 550430448100 = 678661^2 + 741910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011011201021 is a prime.

It is a super-3 number, since 3×1011011201021³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011011200993 and 1011011201011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011011201041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12329404850 + ... + 12329404931.

It is an arithmetic number, because the mean of its divisors is an integer number (258917502711).

Almost surely, 2^{1011011201021} is an apocalyptic number.

It is an amenable number.

1011011201021 is a deficient number, since it is larger than the sum of its proper divisors (24658809823).

1011011201021 is an equidigital number, since it uses as much as digits as its factorization.

1011011201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24658809822.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1011011201021 its reverse (1201021101101), we get a palindrome (2212032302122).

It can be divided in two parts, 101101 and 1201021, that multiplied together give a palindrome (121424424121).

The spelling of 1011011201021 in words is "one trillion, eleven billion, eleven million, two hundred one thousand, twenty-one".