1021603212 has 48 divisors (see below), whose sum is σ = 3026974720. Its totient is φ = 291886416.

The previous prime is 1021603091. The next prime is 1021603223. The reversal of 1021603212 is 2123061201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674908 + ... + 676419.

Almost surely, 2^1021603212 is an apocalyptic number.

1021603212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021603212 is an abundant number, since it is smaller than the sum of its proper divisors (2005371508).

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

1021603212 is a wasteful number, since it uses less digits than its factorization.

1021603212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351347 (or 1351339 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1021603212 is about 31962.5282479343. The cubic root of 1021603212 is about 1007.1498287819.

Adding to 1021603212 its reverse (2123061201), we get a palindrome (3144664413).

The spelling of 1021603212 in words is "one billion, twenty-one million, six hundred three thousand, two hundred twelve".