1022010021 has 16 divisors (see below), whose sum is σ = 1526016000. Its totient is φ = 675972864.

The previous prime is 1022010007. The next prime is 1022010047. The reversal of 1022010021 is 1200102201.

It is not a de Polignac number, because 1022010021 - 2²² = 1017815717 is a prime.

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 = 1022009985 and 1022010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022010091) 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, 145596 + ... + 152453.

It is an arithmetic number, because the mean of its divisors is an integer number (95376000).

Almost surely, 2^1022010021 is an apocalyptic number.

It is an amenable number.

1022010021 is a deficient number, since it is larger than the sum of its proper divisors (504005979).

1022010021 is a wasteful number, since it uses less digits than its factorization.

1022010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298185 (or 298179 counting only the distinct ones).

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

The square root of 1022010021 is about 31968.8914571650. The cubic root of 1022010021 is about 1007.2834955642.

Adding to 1022010021 its reverse (1200102201), we get a palindrome (2222112222).

The spelling of 1022010021 in words is "one billion, twenty-two million, ten thousand, twenty-one".