1022011020 has 60 divisors (see below), whose sum is σ = 3206091504. Its totient is φ = 272535840.

The previous prime is 1022010989. The next prime is 1022011027. The reversal of 1022011020 is 201102201.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1022010993 and 1022011011.

It is not an unprimeable number, because it can be changed into a prime (1022011027) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 313816 + ... + 317055.

Almost surely, 2^1022011020 is an apocalyptic number.

1022011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022011020 is an abundant number, since it is smaller than the sum of its proper divisors (2184080484).

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

1022011020 is a wasteful number, since it uses less digits than its factorization.

1022011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630892 (or 630881 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1022011020 is about 31968.9070817255. The cubic root of 1022011020 is about 1007.2838237658.

Adding to 1022011020 its reverse (201102201), we get a palindrome (1223113221).

The spelling of 1022011020 in words is "one billion, twenty-two million, eleven thousand, twenty".