2012221972 has 12 divisors (see below), whose sum is σ = 3521751156. Its totient is φ = 1006007360.

The previous prime is 2012221957. The next prime is 2012221973. The reversal of 2012221972 is 2791222102.

It can be written as a sum of positive squares in 2 ways, for example, as 1838351376 + 173870596 = 42876^2 + 13186^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2012221972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012221973) 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, 32328 + ... + 71200.

It is an arithmetic number, because the mean of its divisors is an integer number (293479263).

Almost surely, 2^2012221972 is an apocalyptic number.

It is an amenable number.

2012221972 is a deficient number, since it is larger than the sum of its proper divisors (1509529184).

2012221972 is a wasteful number, since it uses less digits than its factorization.

2012221972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51818 (or 51816 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2012221972 is about 44857.7972263463. The cubic root of 2012221972 is about 1262.4822930170.

The spelling of 2012221972 in words is "two billion, twelve million, two hundred twenty-one thousand, nine hundred seventy-two".