1011022020021 has 16 divisors (see below), whose sum is σ = 1451746654400. Its totient is φ = 622157656320.

The previous prime is 1011022020011. The next prime is 1011022020079. The reversal of 1011022020021 is 1200202201101.

It is not a de Polignac number, because 1011022020021 - 2¹⁷ = 1011021888949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011022019979 and 1011022020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011022020011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2933805 + ... + 3260253.

It is an arithmetic number, because the mean of its divisors is an integer number (90734165900).

Almost surely, 2^{1011022020021} is an apocalyptic number.

It is an amenable number.

1011022020021 is a deficient number, since it is larger than the sum of its proper divisors (440724634379).

1011022020021 is a wasteful number, since it uses less digits than its factorization.

1011022020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405876.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1011022020021 its reverse (1200202201101), we get a palindrome (2211224221122).

The spelling of 1011022020021 in words is "one trillion, eleven billion, twenty-two million, twenty thousand, twenty-one".