1021021210 has 16 divisors (see below), whose sum is σ = 2004914592. Its totient is φ = 371280400.

The previous prime is 1021021187. The next prime is 1021021213. The reversal of 1021021210 is 121201201.

It is a super-2 number, since 2×1021021210² = 2084968622539728200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1021021213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4640896 + ... + 4641115.

It is an arithmetic number, because the mean of its divisors is an integer number (125307162).

Almost surely, 2^1021021210 is an apocalyptic number.

1021021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021021210 is a deficient number, since it is larger than the sum of its proper divisors (983893382).

1021021210 is a wasteful number, since it uses less digits than its factorization.

1021021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9282029.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1021021210 is about 31953.4225083949. The cubic root of 1021021210 is about 1006.9585364567.

Adding to 1021021210 its reverse (121201201), we get a palindrome (1142222411).

Subtracting from 1021021210 its reverse (121201201), we obtain a square (899820009 = 29997²).

The spelling of 1021021210 in words is "one billion, twenty-one million, twenty-one thousand, two hundred ten".