1021122012 has 12 divisors (see below), whose sum is σ = 2382618056. Its totient is φ = 340374000.

The previous prime is 1021121993. The next prime is 1021122013. The reversal of 1021122012 is 2102211201.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 85093501 = 1021122012 / (1 + 0 + 2 + 1 + 1 + 2 + 2 + 0 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021122013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42546739 + ... + 42546762.

Almost surely, 2^1021122012 is an apocalyptic number.

1021122012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021122012 is an abundant number, since it is smaller than the sum of its proper divisors (1361496044).

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

1021122012 is a wasteful number, since it uses less digits than its factorization.

1021122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85093508 (or 85093506 counting only the distinct ones).

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

The square root of 1021122012 is about 31954.9997965890. Note that the first 3 decimals coincide. The cubic root of 1021122012 is about 1006.9916732461.

Adding to 1021122012 its reverse (2102211201), we get a palindrome (3123333213).

It can be divided in two parts, 10211 and 22012, that added together give a palindrome (32223).

The spelling of 1021122012 in words is "one billion, twenty-one million, one hundred twenty-two thousand, twelve".