1011220101021 has 32 divisors (see below), whose sum is σ = 1454515655040. Its totient is φ = 621215712000.

The previous prime is 1011220101019. The next prime is 1011220101049. The reversal of 1011220101021 is 1201010221101.

It is not a de Polignac number, because 1011220101021 - 2¹ = 1011220101019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011220100988 and 1011220101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011220101061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56260566 + ... + 56278536.

It is an arithmetic number, because the mean of its divisors is an integer number (45453614220).

Almost surely, 2^{1011220101021} is an apocalyptic number.

It is an amenable number.

1011220101021 is a deficient number, since it is larger than the sum of its proper divisors (443295554019).

1011220101021 is a wasteful number, since it uses less digits than its factorization.

1011220101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20397.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1011220101021 its reverse (1201010221101), we get a palindrome (2212230322122).

The spelling of 1011220101021 in words is "one trillion, eleven billion, two hundred twenty million, one hundred one thousand, twenty-one".