1011012221021 has 12 divisors (see below), whose sum is σ = 1112368588800. Its totient is φ = 918199942440.

The previous prime is 1011012220997. The next prime is 1011012221041. The reversal of 1011012221021 is 1201222101101.

1011012221021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1011012221021 - 2⁶ = 1011012220957 is a prime.

It is a super-2 number, since 2×1011012221021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011012220987 and 1011012221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011012221041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3976541 + ... + 4223138.

It is an arithmetic number, because the mean of its divisors is an integer number (92697382400).

Almost surely, 2^{1011012221021} is an apocalyptic number.

1011012221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011012221021 is a deficient number, since it is larger than the sum of its proper divisors (101356367779).

1011012221021 is a wasteful number, since it uses less digits than its factorization.

1011012221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8200720 (or 8200709 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1011012221021 its reverse (1201222101101), we get a palindrome (2212234322122).

The spelling of 1011012221021 in words is "one trillion, eleven billion, twelve million, two hundred twenty-one thousand, twenty-one".